770802007: Nail unit structure (body structure)

SNOMED CT Concept\Body structure (body structure)\Anatomical or acquired body structure (body structure)\Anatomical structure\...

\An anatomical structure that consists of the maximal set of organ parts so connected to one another that together they constitute a self-contained unit of macroscopic anatomy, distinct both morphologically and functionally from other such units. Together with other organs, an organ constitutes an organ system or a body part. An organ is divisible into organ parts but not organs (examples: femur, biceps, liver, heart, aorta, sciatic nerve, ovary).\Organ part\Skin part\Structure of skin region\Skin structure of limb\Skin of part of limb (body structure)\Skin of digit\Skin of part of digit\Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.
\An anatomical structure that consists of the maximal set of organ parts so connected to one another that together they constitute a self-contained unit of macroscopic anatomy, distinct both morphologically and functionally from other such units. Together with other organs, an organ constitutes an organ system or a body part. An organ is divisible into organ parts but not organs (examples: femur, biceps, liver, heart, aorta, sciatic nerve, ovary).\Skin structure\Skin part\Structure of skin region\Skin structure of limb\Skin of part of limb (body structure)\Skin of digit\Skin of part of digit\Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.
\An anatomical structure that consists of the maximal set of organ parts so connected to one another that together they constitute a self-contained unit of macroscopic anatomy, distinct both morphologically and functionally from other such units. Together with other organs, an organ constitutes an organ system or a body part. An organ is divisible into organ parts but not organs (examples: femur, biceps, liver, heart, aorta, sciatic nerve, ovary).\Skin structure\Skin appendage structure (body structure)\Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.

\Body system structure\Structure of subdivision of organ system (body structure)\Skin and/or subcutaneous tissue structure (body structure)\Skin and/or subcutaneous tissue structure of limb (body structure)\Skin structure of limb\Skin of part of limb (body structure)\Skin of digit\Skin of part of digit\Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.
\Body system structure\Structure of subdivision of organ system (body structure)\Skin and/or subcutaneous tissue structure (body structure)\Skin structure\Skin part\Structure of skin region\Skin structure of limb\Skin of part of limb (body structure)\Skin of digit\Skin of part of digit\Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.
\Body system structure\Structure of subdivision of organ system (body structure)\Skin and/or subcutaneous tissue structure (body structure)\Skin structure\Skin appendage structure (body structure)\Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.
\Body system structure\Structure of skin and/or mucous membrane (body structure)\Region consisting of all body skin and directly related mucosa but excluding mucosa within the body such as the mucous membrane of the urinary bladder.\Skin structure\Skin part\Structure of skin region\Skin structure of limb\Skin of part of limb (body structure)\Skin of digit\Skin of part of digit\Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.
\Body system structure\Structure of skin and/or mucous membrane (body structure)\Region consisting of all body skin and directly related mucosa but excluding mucosa within the body such as the mucous membrane of the urinary bladder.\Skin structure\Skin appendage structure (body structure)\Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.
\Body system structure\Structure of skin and/or surface epithelium (body structure)\Skin structure\Skin part\Structure of skin region\Skin structure of limb\Skin of part of limb (body structure)\Skin of digit\Skin of part of digit\Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.
\Body system structure\Structure of skin and/or surface epithelium (body structure)\Skin structure\Skin appendage structure (body structure)\Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.
\Body system structure\Structure of integumentary system (body structure)\Integumentary system part (body structure)\Skin and/or subcutaneous tissue structure (body structure)\Skin and/or subcutaneous tissue structure of limb (body structure)\Skin structure of limb\Skin of part of limb (body structure)\Skin of digit\Skin of part of digit\Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.
\Body system structure\Structure of integumentary system (body structure)\Integumentary system part (body structure)\Skin and/or subcutaneous tissue structure (body structure)\Skin structure\Skin part\Structure of skin region\Skin structure of limb\Skin of part of limb (body structure)\Skin of digit\Skin of part of digit\Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.
\Body system structure\Structure of integumentary system (body structure)\Integumentary system part (body structure)\Skin and/or subcutaneous tissue structure (body structure)\Skin structure\Skin appendage structure (body structure)\Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.

\Body tissue structure\Structure of soft tissue (body structure)\...

\Structure of soft tissue of limb (body structure)\Skin and/or subcutaneous tissue structure of limb (body structure)\Skin structure of limb\Skin of part of limb (body structure)\Skin of digit\Skin of part of digit\Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.

\Skin and/or subcutaneous tissue structure (body structure)\Skin and/or subcutaneous tissue structure of limb (body structure)\Skin structure of limb\Skin of part of limb (body structure)\Skin of digit\Skin of part of digit\Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.
\Skin and/or subcutaneous tissue structure (body structure)\Skin structure\Skin part\Structure of skin region\Skin structure of limb\Skin of part of limb (body structure)\Skin of digit\Skin of part of digit\Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.
\Skin and/or subcutaneous tissue structure (body structure)\Skin structure\Skin appendage structure (body structure)\Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.

\Body region structure\Structure of half of body lateral to midsagittal plane (body structure)\Limb structure\Limb part (body structure)\Structure of soft tissue of limb (body structure)\Skin and/or subcutaneous tissue structure of limb (body structure)\Skin structure of limb\Skin of part of limb (body structure)\Skin of digit\Skin of part of digit\Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.
\Body region structure\Structure of half of body lateral to midsagittal plane (body structure)\Limb structure\Limb part (body structure)\Digit structure\Skin of digit\Skin of part of digit\Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.
\Body region structure\Skin and/or subcutaneous tissue structure (body structure)\Skin and/or subcutaneous tissue structure of limb (body structure)\Skin structure of limb\Skin of part of limb (body structure)\Skin of digit\Skin of part of digit\Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.
\Body region structure\Skin and/or subcutaneous tissue structure (body structure)\Skin structure\Skin part\Structure of skin region\Skin structure of limb\Skin of part of limb (body structure)\Skin of digit\Skin of part of digit\Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.
\Body region structure\Skin and/or subcutaneous tissue structure (body structure)\Skin structure\Skin appendage structure (body structure)\Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.
\Body region structure\Body part structure\Limb structure\Limb part (body structure)\Structure of soft tissue of limb (body structure)\Skin and/or subcutaneous tissue structure of limb (body structure)\Skin structure of limb\Skin of part of limb (body structure)\Skin of digit\Skin of part of digit\Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.
\Body region structure\Body part structure\Limb structure\Limb part (body structure)\Digit structure\Skin of digit\Skin of part of digit\Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.

Status: current, Not sufficiently defined by necessary conditions definition status (core metadata concept). Date: 31-Jan 2019. Module: SNOMED CT core

Descriptions:

Id Description Lang Type Status Case? Module

3776999012 Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate. en Definition Active Entire term case sensitive (core metadata concept) SNOMED CT core

3702885018 Nail region structure en Synonym (core metadata concept) Active Entire term case insensitive (core metadata concept) SNOMED CT core

3702886017 Nail unit structure en Synonym (core metadata concept) Active Entire term case insensitive (core metadata concept) SNOMED CT core

3702887014 Nail unit structure (body structure) en Fully specified name Active Entire term case insensitive (core metadata concept) SNOMED CT core

Expanded Value Set

Outbound Relationships	Type	Target	Active	Characteristic	Refinability	Group	Values
Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Is a	Digit structure	false	Inferred relationship	Some
Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Is a	Structure of integumentary system (body structure)	false	Inferred relationship	Some
Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Laterality	Side (qualifier value)	true	Inferred relationship	Some
Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Is a	Skin of part of digit	true	Inferred relationship	Some
Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Is a	Skin appendage structure (body structure)	true	Inferred relationship	Some

Inbound Relationships	Type	Active	Source	Characteristic	Refinability	Group
Pachyonychia congenita type II of Jackson-Lawler (disorder)	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	1
Pachyonychia congenita type III of Schafer-Brunauer (disorder)	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	1
A rare, genetic, ectodermal dysplasia syndrome characterized by skin, hair and nail anomalies (i.e. generalized ichthyosis, congenital alopecia universalis, dystrophic, convex nails), associated with hypohidrosis without hyperthermia, intellectual disability, seizures, and skeletal (e.g. proportionate short stature, platyspondyly) and intestinal (e.g. congenital aganglionic megacolon) anomalies. Facial dysmorphism includes frontal bossing, blepharophimosis, large ears, low nasal bridge and small nose. There have been no further descriptions in the literature since 1992.	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	3
Nail dystrophy co-occurrent with reactive arthritis triad (disorder)	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	4
A rare ectodermal dysplasia syndrome characterized by congenital onychodystrophy (particularly of the distal nail) and severe hypotrichosis with alopecia involving the eyebrows, eyelashes and body hair. Scalp, beard, pubic and axillary hair is brittle and shows a twisting pattern on electron microscopy. There have been no further descriptions in the literature since 1991.	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	2
Schinzel-Giedion syndrome	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	2
Hypohidrotic X-linked ectodermal dysplasia	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	2
Roselli-Gulienetti ectodermal dysplasia (disorder)	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	2
Alopecia, onychodysplasia, hypohidrosis, deafness ectodermal dysplasia	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	2
Basan syndrome	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	2
Greither type of ectodermal dysplasia	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	2
Tricho-onychodental dysplasia	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	2
syndrome de Schoef-Schulz-Passage	Finding site	False	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	2
Odonto-onychial dysplasia with alopecia	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	4
Fried's tooth and nail syndrome	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	2
Hypodontia and nail dysgenesis	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	4
dysplasie dermodentaire	Finding site	False	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	2
Salamon's syndrome	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	2
Ectodermal dysplasia, syndactyly and pili torti	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	2
Dwarfism, alopecia, pseudoanodontia, cutis laxa	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	2
Hypohidrosis-diabetes insipidus syndrome	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	3
Odontotrichomelic syndrome (disorder)	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	4
syndrome dento-oculocutané	Finding site	False	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	4
Curry-Hall syndrome	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	4
Ectodermal dysplasia with hair-tooth-nail-sweating defect	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	4
Ectodermal dysplasia with hair-tooth-nail defects (disorder)	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	4
Ectodermal dysplasia with tooth-nail defects	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	4
Tricho-dento-osseous syndrome	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	2
Ectrodactyly-ectodermal dysplasia-clefting syndrome	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	7
Hypoplastic enamel-onycholysis-hypohidrosis syndrome (disorder)	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	4
Odonto-onycho-dermal dysplasia (disorder)	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	2
Odontomicronychial ectodermal dysplasia (disorder)	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	4
Ectodermal dysplasia with tooth-nail-sweating defect (disorder)	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	4
Chondroectodermal dysplasia	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	5
Hay-Wells syndrome of ectodermal dysplasia	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	7
Hidrotic ectodermal dysplasia syndrome	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	5
Anhidrotic ectodermal dysplasia with immune deficiency (disorder)	Finding site	False	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	2
Autosomal dominant hypohidrotic ectodermal dysplasia syndrome	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	3
A rare ectodermal dysplasia syndrome characterized by ectrodactyly, syndactyly, mammary hypoplasia, and excessive freckling as well as other typical ectodermal defects such as hypodontia, lacrimal duct anomalies, hypotrichosis, and onychodysplasia.	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	5
A rare genetic disease characterized by infantile onset of recurrent skin ulcerations, arthralgias, fever, peri-articular fistulous osteolysis, oligodontia, nail dystrophy, and keratitis. The disease takes a self-limiting course in childhood but results in severe cicatrization, chronic arthroses, pseudoacromegalic appearance of hands and feet, secondary scoliosis, and visual impairment. There have been no further descriptions in the literature since 1983.	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	4
A rare ectodermal dysplasia syndrome characterized by a variably severe clinical picture comprising dry, thin skin, onychodysplasia, trichodysplasia, and dental abnormalities (such as hypodontia, microdontia, and persistence of deciduous teeth). There have been no further descriptions in the literature since 1990.	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	3
A rare ectodermal dysplasia syndrome characterized by bilateral retinitis pigmentosa, trichodysplasia (generalized hypotrichosis, structural changes), dental anomalies, onychodysplasia, and dry and scaly skin. There have been no further descriptions in the literature since 1988.	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	3
A rare, genetic, ectodermal dysplasia syndrome characterized by corneal epithelial changes (ranging from roughening to nodular irregularities), diffuse palmoplantar hyperkeratosis with thickened, erythematous, scaly lesions affecting the elbows, knees and knuckles, distal onycholysis, brachydactyly accompanied by a single transverse palmar crease, short stature, premature birth, and increased susceptibility to tooth decay. Ocular symptoms include photophobia, reduced night vision, burning and watery eyes, and varying visual acuity. There have been no further descriptions in the literature since 1984.	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	4
Ectodermal dysplasia, trichoodontoonychial type is a form of ectodermal dysplasia with hair, teeth and nail involvement characterized predominantly by hypodontia, hypotrichosis, delayed hair growth and brittle nails. Additionally, focal dermal hypoplasia, irregular hyperpigmentation, hypoplastic or absent nipples, amastia, hearing impairment, congenital hip dislocation and asthma have been associated. There have been no further descriptions in the literature since 1996.	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	1
Chondroectodermal dysplasia with night blindness is a rare genetic bone development disorder characterized by proportionate short stature, nail dysplasia (enlarged, convex, hypertrophic nails), hypodontia and night blindness. Osteopenia, a tendency to present fractures, talipes varus with abnormal gait, ear infections, and watering eyes due to narrow tear ducts are frequently associated. Radiologically patients present delayed bone age on wrist X-rays, platyspondyly, and broad metaphyses of humeri with dense and thickened growth plates.	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	7
Hypotrichosis-osteolysis-periodontitis-palmoplantar keratoderma syndrome is an extremely rare ectodermal dysplasia syndrome characterized by hypotrichosis universalis with mild to severe scarring alopecia, acro-osteolysis, onychogryphosis, thin and tapered fingertips, periodontitis and caries leading to premature teeth loss, linear or reticular palmoplantar keratoderma and erythematous, scaling, psoriasis-like skin lesions on arms and legs. Lingua plicata and ventricular tachycardia have also been observed.	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	6
Curly hair-acral keratoderma-caries syndrome is an extremely rare ectodermal dysplasia syndrome characterized by premature loss of curly, brittle, dry hair, premature loss of teeth due to caries, nail dystrophy with thickening of the finger- and toenails, acral keratoderma and hypohidrosis. Additionally, sparse eyebrows and eyelashes, receding frontal hairline and flattened malar region are associated. The severity of features appears to increase with age.	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	4
A rare, genetic developmental defect during embryogenesis syndrome characterized by camptodactyly, joint contractures with amyotrophy, and ectodermal anomalies (oligodontia, enamel abnormalities, longitudinally broken nails, hypohidrotic skin with tendency to excessive bruising and scarring after injuries and scratching), as well as growth retardation, kyphoscoliosis, mild facial dysmorphism, and microcephaly. There have been no further descriptions in the literature since 1992.	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	7
Disorder of nail due to dermatosis	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	1
Nail dystrophy due to eczema (disorder)	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	1
Autosomal recessive hypohidrotic ectodermal dysplasia syndrome	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	4
Hereditary clubbing (disorder)	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	2
Nail dystrophy due to cytotoxic therapy (disorder)	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	1
Hereditary lymphedema and yellow nails (disorder)	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	3
Pachydermoperiostosis (PDP) is a form of primary hypertrophic osteoarthropathy, a rare hereditary disorder, and is characterised by digital clubbing, pachydermia and subperiosteal new bone formation associated with pain, polyarthritis, cutis verticis gyrata, seborrhoea and hyperhidrosis. Three forms have been described: a complete form with pachydermia and periostitis, an incomplete form with evidence of bone abnormalities but lacking pachydermia, and a forme fruste with prominent pachydermia and minimal-to-absent skeletal changes.	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	1
Racket nail	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	2
Median nail dystrophy of Heller	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	2
Twenty nail dystrophy	Finding site	False	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	2
Pterygium of nail	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	1
Congenital pterygium of nail (disorder)	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	1
Nail pterygium in lichen planus (disorder)	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	2
Acquired pterygium of nail (disorder)	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	1
Acquired pterygium of nail (disorder)	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	2
Pterygium of nail	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	2
Pterygium inversum unguis	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	2
Dorsal pterygium of nail (disorder)	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	2
Nail pterygium in lichen planus (disorder)	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	7
Nail fragility (finding)	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	2
Incontinentia pigmenti syndrome	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	4
A rare multiple congenital anomalies syndrome characterized by congenital hearing impairment, small or absent nails on the hands and feet, and small or absent terminal phalanges.	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	2
A rare genetic skin disease characterised by infantile onset of diffuse alopecia, abnormal skin pigmentation (hypo- and hyperpigmented macules of the trunk and face and areas of reticular hypo- and hyperpigmentation of the extremities), palmoplantar keratoderma, and nail dystrophy. Patients develop recurrent spinocellular carcinomas later in life. Brittle teeth resulting in early loss of dentition have also been described.	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	5
A rare genetic skin disease characterized by generalized skin peeling or superficial blisters without scarring, leukonychia, acral punctate keratoses coalescing into focal keratoderma on the weight-bearing areas, painful angular cheilitis, and knuckle pads with multiple hyperkeratotic micropapules. The skin appears dry and scaly with superficial exfoliation and underlying erythema. Histopathologic examination of affected skin areas is not specific and shows hyperkeratosis, acanthosis, and occasional intraepidermal clefting with irregular acantholysis.	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	4
Hypertrophy of nail caused by drug (disorder)	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	1
Fragility of nail caused by drug (finding)	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	1
Pitting of nail due to alopecia areata (disorder)	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	1
Longitudinal erythronychia	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	1
Acquired deformity of nail due to habit tic (disorder)	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	1
Congenital isolated onychodysplasia	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	1
Nail dystrophy due to epidermolysis bullosa	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	1
Hypertrophy of nail due to psoriasis (disorder)	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	1
A rare ectodermal dysplasia syndrome characterized by hypotrichosis, tooth enamel hypoplasia, hypoplastic nails, palmoplantar keratoderma, hyperhidrosis on hands, face, and scalp, bilateral partial cutaneous syndactyly, and dysmorphic facial features with large prominent ear pinnae, pointed nose, and thin upper lips. Association of cardiomegaly has also been reported.	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	7
Disorder of nail due to disorder (disorder)	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	1
Onychomadesis due to and following hand foot and mouth disease (disorder)	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	2
Nail dystrophy caused by chemical	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	1
A rare mesomelic and rhizo-mesomelic dysplasia with characteristics of marked mesomelic shortening of the lower limbs, cutaneous syndactyly and nail abnormalities (placed on the palmar side of the finger, dysplastic or absent) in hands and feet due to mutations in EN1 gene. Other clinical features may include genitourinary abnormalities (including bilateral cryptorchidism, vesicoureteral reflux, hydronephrosis, hypoplastic labia majora), spasticity and seizures.	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	4
Aplasia of nail unit	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	1
A rare, isolated nail anomaly characterised by brittle, thin, rough, opaque appearing nails with excessive longitudinal ridging. In a less severe form, the nails retain their luster and present with superficial ridging and multiple small geometric pits. In both varieties, superficial scaling of the nail plate and hyperkeratosis of the cuticles, as well as koilonychia and onychoschizia are observed. Any number of nails may be affected, and fingernails are more often affected than toenails. Spontaneous improvement of the condition may occur.	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	1
Congenital hypoplasia of nail unit (disorder)	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	1
Chloronychia	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	1
Chloronychia caused by Pseudomonas (disorder)	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	1
Congenital dysplasia of nail unit (disorder)	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	1
Schöpf-Schulz-Passarge syndrome	Finding site	True	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	Inferred relationship	Some	4

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Reference Sets

Lateralizable body structure reference set (foundation metadata concept)

Anatomy structure and entire association reference set (foundation metadata concept)

Anatomy structure and part association reference set (foundation metadata concept)

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Id	Description	Lang	Type	Status	Case?	Module
3776999012	Nail unit is a complex structure which consists of nail plate, nail bed, nail root and skin around the nail plate.	en	Definition	Active	Entire term case sensitive (core metadata concept)	SNOMED CT core
3702885018	Nail region structure	en	Synonym (core metadata concept)	Active	Entire term case insensitive (core metadata concept)	SNOMED CT core
3702886017	Nail unit structure	en	Synonym (core metadata concept)	Active	Entire term case insensitive (core metadata concept)	SNOMED CT core
3702887014	Nail unit structure (body structure)	en	Fully specified name	Active	Entire term case insensitive (core metadata concept)	SNOMED CT core