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49755003: Morphologically abnormal structure (morphologic abnormality)

Status: current, Not sufficiently defined by necessary conditions definition status (core metadata concept). Date: 31-Jan 2002. Module: SNOMED CT core

Descriptions:

Id Description Lang Type Status Case? Module
82877014 Abnormal tissue appearance en Synonym (core metadata concept) Active Entire term case insensitive (core metadata concept) SNOMED CT core
495494014 Morphologically abnormal structure en Synonym (core metadata concept) Active Entire term case insensitive (core metadata concept) SNOMED CT core
787468010 Morphologically abnormal structure (morphologic abnormality) en Fully specified name Active Entire term case insensitive (core metadata concept) SNOMED CT core
3371000077116 structure anormale sur le plan morphologique fr Synonym (core metadata concept) Active Entire term case insensitive (core metadata concept) SNOMED CT Switzerland NRC maintained Module

5223 descendants. Search Descendants:

Expanded Value Set

Outbound Relationships Type Target Active Characteristic Refinability Group Values
Morphologically abnormal structure Is a Morphologically altered structure true Inferred relationship Some
Inbound Relationships Type Active Source Characteristic Refinability Group
Congenital right vesicoureterorenal reflux Associated morphology True Morphologically abnormal structure Inferred relationship Some 2
Congenital right vesicoureterorenal reflux Associated morphology True Morphologically abnormal structure Inferred relationship Some 1
Hereditary neurocutaneous angiomata (disorder) Associated morphology False Morphologically abnormal structure Inferred relationship Some 1
Hereditary neurocutaneous angiomata (disorder) Associated morphology True Morphologically abnormal structure Inferred relationship Some 2
Distal penile hypospadias Associated morphology True Morphologically abnormal structure Inferred relationship Some 1
A very rare, genetic, congenital limb malformation syndrome characterized by duplication of the fibula associated with pre-axial mirror polydactyly of the foot, that may occur as an isolated malformation or be associated with other anomalies, including ulnar dimelia, facial abnormalities and sacrococcygeal teratoma. Associated morphology True Morphologically abnormal structure Inferred relationship Some 2
Ulbright-Hodes syndrome is characterized by renal dysplasia, growth retardation, phocomelia or mesomelia, radiohumeral fusion, rib abnormalities, anomalies of the external genitalia and a Potter-like facies. The syndrome has been described in three infants (one pair of siblings and an unrelated case), all of whom died shortly after birth from respiratory distress resulting from pulmonary hypoplasia and oligohydramnios caused by renal dysplasia. The mode of transmission appears to be autosomal recessive. Associated morphology True Morphologically abnormal structure Inferred relationship Some 2
Amelogenesis imperfecta - recessive - rough Associated morphology True Morphologically abnormal structure Inferred relationship Some 1
Congenital abnormalities of thoracic aortic branches Associated morphology True Morphologically abnormal structure Inferred relationship Some 1
Congenital anomaly of lumbar vertebra Associated morphology True Morphologically abnormal structure Inferred relationship Some 1
Completely unroofed coronary sinus defect in left atrium (disorder) Associated morphology True Morphologically abnormal structure Inferred relationship Some 1
Completely unroofed coronary sinus defect in left atrium (disorder) Associated morphology True Morphologically abnormal structure Inferred relationship Some 2
Beaded hair Associated morphology True Morphologically abnormal structure Inferred relationship Some 1
Oculoauricular syndrome, Schorderet type is a rare, genetic developmental defect during embryogenesis syndrome characterized by various ophthalmic anomalies (including congenital microphthalmia, microcornea, cataract, anterior segment dysgenesis, ocular coloboma and early onset rod-cone dystrophy) and abnormal external ears (low-set pinna with crumpled helix, narrow intertragic incisures, abnormal bridge connecting the crus of the helix and the antihelix, narrow external acoustic meatus, and lobule aplasia). Associated morphology True Morphologically abnormal structure Inferred relationship Some 1
Oculoauricular syndrome, Schorderet type is a rare, genetic developmental defect during embryogenesis syndrome characterized by various ophthalmic anomalies (including congenital microphthalmia, microcornea, cataract, anterior segment dysgenesis, ocular coloboma and early onset rod-cone dystrophy) and abnormal external ears (low-set pinna with crumpled helix, narrow intertragic incisures, abnormal bridge connecting the crus of the helix and the antihelix, narrow external acoustic meatus, and lobule aplasia). Associated morphology True Morphologically abnormal structure Inferred relationship Some 2
Dysmorphism-cleft palate-loose skin syndrome is a rare, genetic developmental defect during embryogenesis characterized by severe psychomotor delay, intellectual disability, congenital, symmetrical circumferential skin creases of arms and legs, cleft palate, and facial dysmorphism (including elongated face, high forehead, blepharophimosis, short palpebral fissures, microphthalmia, microcornea, epicanthic folds, telecanthus, microtia, posteriorly angulated ears, broad nasal bridge, microstomia and micrognathia). Additional features reported include short stature, microcephaly, hypotonia, pectus excavatum, severe scoliosis, hypoplastic scrotum, and mixed hearing loss. Associated morphology True Morphologically abnormal structure Inferred relationship Some 1
Yemenite deaf-blind hypopigmentation syndrome is an exceedingly rare genetic disorder characterized by cutaneous pigmentation anomalies, ocular disorders and hearing loss. Associated morphology True Morphologically abnormal structure Inferred relationship Some 1
A rare multiple congenital anomalies/dysmorphic syndrome characterized by intrauterine growth retardation, multiple congenital malformations (such as brain malformations including ectopic neuro-pituitary gland, hypoplastic adenopituitary, and hypoplastic cerebellar vermis, cardiac and renal anomalies, and postaxial polydactyly), abnormal hair structure with temporal balding, and dysmorphic facial features with hypoplastic nasal bridge, anteverted nostrils, dysplastic ears, long and smooth philtrum, narrow upper lip, and prominent, asymmetric lower lip. Postnatal growth retardation and severe developmental delay have also been reported. Associated morphology True Morphologically abnormal structure Inferred relationship Some 4
A rare multiple congenital anomalies/dysmorphic syndrome characterized by intrauterine growth retardation, multiple congenital malformations (such as brain malformations including ectopic neuro-pituitary gland, hypoplastic adenopituitary, and hypoplastic cerebellar vermis, cardiac and renal anomalies, and postaxial polydactyly), abnormal hair structure with temporal balding, and dysmorphic facial features with hypoplastic nasal bridge, anteverted nostrils, dysplastic ears, long and smooth philtrum, narrow upper lip, and prominent, asymmetric lower lip. Postnatal growth retardation and severe developmental delay have also been reported. Associated morphology True Morphologically abnormal structure Inferred relationship Some 1
Ectodermal dysplasia with hair-nail defect Associated morphology True Morphologically abnormal structure Inferred relationship Some 2
Ectodermal dysplasia with hair-nail defect Associated morphology True Morphologically abnormal structure Inferred relationship Some 1
Ectodermal dysplasia with hair-nail defect Associated morphology False Morphologically abnormal structure Inferred relationship Some 4
Spina bifida aperta Associated morphology True Morphologically abnormal structure Inferred relationship Some 4
Spina bifida aperta Associated morphology True Morphologically abnormal structure Inferred relationship Some 3
Windblown hand Associated morphology True Morphologically abnormal structure Inferred relationship Some 1
Goniodysgenesis (disorder) Associated morphology False Morphologically abnormal structure Inferred relationship Some 2
Goniodysgenesis (disorder) Associated morphology True Morphologically abnormal structure Inferred relationship Some 1
A rare multiple congenital malformation syndrome, characterized by an association of cleft lip and palate, patchy pigmentary retinopathy (cat's paw), obstructive liver disease (cholestasis, portal hypertension etc.) and obstructive renal disease (ectopic ureteric insertion, obstruction, vesicoureteral reflux and hydronephrosis). Gastrointestinal tract involvement (malrotation, gastroesophageal reflux etc.) and cardiac involvement (coarctation of aorta, pulmonary artery stenosis, etc.) have also been reported. An overlap with Kabuki syndrome is debated. Associated morphology True Morphologically abnormal structure Inferred relationship Some 5
Kenny syndrome Associated morphology True Morphologically abnormal structure Inferred relationship Some 1
Systemic to pulmonary collateral artery connecting with isolated intraparenchymal pulmonary arteries (disorder) Associated morphology True Morphologically abnormal structure Inferred relationship Some 2
Systemic to pulmonary collateral artery connecting with isolated intraparenchymal pulmonary arteries (disorder) Associated morphology True Morphologically abnormal structure Inferred relationship Some 1
X-linked muscular dystrophy with limb girdle distribution Associated morphology False Morphologically abnormal structure Inferred relationship Some 2
Cervical thyroid remnant Associated morphology False Morphologically abnormal structure Inferred relationship Some 1
Alobar holoprosencephaly Associated morphology True Morphologically abnormal structure Inferred relationship Some 1
A rare, syndromic intellectual disability characterized by macrocephaly, short stature, intellectual disability, variable degree of spastic paraplegia, central nervous system malformations (hydrocephalus, Dandy-Walker malformation), and dysmorphic features, such as high and broad forehead, midface hypoplasia, and small and broad hands and feet. There have been no further descriptions in the literature since 1993. Associated morphology True Morphologically abnormal structure Inferred relationship Some 1
This syndrome is characterized by severe immunodeficiency, osteopetrosis, lymphedema and anhidrotic ectodermal dysplasia. Associated morphology True Morphologically abnormal structure Inferred relationship Some 1
This syndrome is characterized by severe immunodeficiency, osteopetrosis, lymphedema and anhidrotic ectodermal dysplasia. Associated morphology True Morphologically abnormal structure Inferred relationship Some 3
Congenital anomaly of cardiovascular system Associated morphology True Morphologically abnormal structure Inferred relationship Some 1
A rare genetic syndrome with limb reduction defects characterized by skeletal malformations comprising absent or hypoplastic pelvic bones (including sacral agenesis or hypoplasia), intercalary limb deficiencies (phocomelia potentially combined with polydactyly, oligodactyly or ectrodactyly), and skull defects (frequently a defect of the occipital bone with or without meningocele). Additional features may include thoracic dystrophy, dysmorphic facial features (dysplastic and large ears, and a high and narrow palate), and genital malformations (Mullerian aplasia, agenesis of the uterus and vagina, micropenis with cryptorchidism). Growth and mental development are not affected. Associated morphology True Morphologically abnormal structure Inferred relationship Some 1
Aortic orifice right side by side with respect to pulmonary orifice (disorder) Associated morphology False Morphologically abnormal structure Inferred relationship Some 2
Lack of ossification of centrum of thoracic vertebra Associated morphology True Morphologically abnormal structure Inferred relationship Some 2
3q27.3 microdeletion syndrome is a rare chromosomal anomaly syndrome, resulting from the partial deletion of the long arm of chromosome 3, characterized by mild to severe intellectual disability, neuropsychiatric disorders of the psychotic and dysthymic spectrum, mild distinctive facial dysmorphism (including slender face, deep-set eyes, high nasal bridge with a hooked nose, small, low- set ears, short philtrum, small mouth with thin upper lip, prognathism) and a marfanoid habitus. Associated morphology True Morphologically abnormal structure Inferred relationship Some 2
Congenital anomaly of spleen Associated morphology True Morphologically abnormal structure Inferred relationship Some 1
A rare disorder characterized by the association of mullerian duct and distal limb anomalies. Females present with anomalies ranging from a vaginal septum to complete duplication of uterus and vagina, and males present with micropenis. The limb anomalies varied from postaxial polydactyly to severe upper limb hypoplasia with split hand. Associated morphology True Morphologically abnormal structure Inferred relationship Some 1
A rare disorder characterized by the association of mullerian duct and distal limb anomalies. Females present with anomalies ranging from a vaginal septum to complete duplication of uterus and vagina, and males present with micropenis. The limb anomalies varied from postaxial polydactyly to severe upper limb hypoplasia with split hand. Associated morphology True Morphologically abnormal structure Inferred relationship Some 2
Microdysgenesis Associated morphology True Morphologically abnormal structure Inferred relationship Some 1
A group of dysmorphic complexes (including Charlie M syndrome, Hanhart syndrome and glossopalatine ankylosis) with the association of severe asymmetric limb defects (primarily involving distal segments) and abnormalities of the oral cavity and mandible (hypoglossia, aglossia, micrognathia, glossopalatine ankylosis, cleft palate, and gingival anomalies). Associated morphology True Morphologically abnormal structure Inferred relationship Some 3
A group of dysmorphic complexes (including Charlie M syndrome, Hanhart syndrome and glossopalatine ankylosis) with the association of severe asymmetric limb defects (primarily involving distal segments) and abnormalities of the oral cavity and mandible (hypoglossia, aglossia, micrognathia, glossopalatine ankylosis, cleft palate, and gingival anomalies). Associated morphology True Morphologically abnormal structure Inferred relationship Some 2
A group of dysmorphic complexes (including Charlie M syndrome, Hanhart syndrome and glossopalatine ankylosis) with the association of severe asymmetric limb defects (primarily involving distal segments) and abnormalities of the oral cavity and mandible (hypoglossia, aglossia, micrognathia, glossopalatine ankylosis, cleft palate, and gingival anomalies). Associated morphology True Morphologically abnormal structure Inferred relationship Some 1
Kommerell's diverticulum Associated morphology True Morphologically abnormal structure Inferred relationship Some 1
Kommerell's diverticulum Associated morphology False Morphologically abnormal structure Inferred relationship Some 2
White forelock with malformations is a multiple congenital anomalies syndrome characterized by poliosis, distinct facial features (epicanthal folds, hypertelorism, posterior rotation of ears, prominent philtrum, high-arched palate) and congenital anomalies/malformations of the eye (blue sclera), cardiopulmonary (atrial septal defect, prominent thoracic and abdominal veins), and skeletal (clinodactyly, syndactyly of the fingers and 2nd and 3rd toes) systems. There have been no further descriptions in the literature since 1980. Associated morphology True Morphologically abnormal structure Inferred relationship Some 1
White forelock with malformations is a multiple congenital anomalies syndrome characterized by poliosis, distinct facial features (epicanthal folds, hypertelorism, posterior rotation of ears, prominent philtrum, high-arched palate) and congenital anomalies/malformations of the eye (blue sclera), cardiopulmonary (atrial septal defect, prominent thoracic and abdominal veins), and skeletal (clinodactyly, syndactyly of the fingers and 2nd and 3rd toes) systems. There have been no further descriptions in the literature since 1980. Associated morphology True Morphologically abnormal structure Inferred relationship Some 5
White forelock with malformations is a multiple congenital anomalies syndrome characterized by poliosis, distinct facial features (epicanthal folds, hypertelorism, posterior rotation of ears, prominent philtrum, high-arched palate) and congenital anomalies/malformations of the eye (blue sclera), cardiopulmonary (atrial septal defect, prominent thoracic and abdominal veins), and skeletal (clinodactyly, syndactyly of the fingers and 2nd and 3rd toes) systems. There have been no further descriptions in the literature since 1980. Associated morphology True Morphologically abnormal structure Inferred relationship Some 2
White forelock with malformations is a multiple congenital anomalies syndrome characterized by poliosis, distinct facial features (epicanthal folds, hypertelorism, posterior rotation of ears, prominent philtrum, high-arched palate) and congenital anomalies/malformations of the eye (blue sclera), cardiopulmonary (atrial septal defect, prominent thoracic and abdominal veins), and skeletal (clinodactyly, syndactyly of the fingers and 2nd and 3rd toes) systems. There have been no further descriptions in the literature since 1980. Associated morphology True Morphologically abnormal structure Inferred relationship Some 3
White forelock with malformations is a multiple congenital anomalies syndrome characterized by poliosis, distinct facial features (epicanthal folds, hypertelorism, posterior rotation of ears, prominent philtrum, high-arched palate) and congenital anomalies/malformations of the eye (blue sclera), cardiopulmonary (atrial septal defect, prominent thoracic and abdominal veins), and skeletal (clinodactyly, syndactyly of the fingers and 2nd and 3rd toes) systems. There have been no further descriptions in the literature since 1980. Associated morphology True Morphologically abnormal structure Inferred relationship Some 4
Hypertelorism-microtia-facial clefting syndrome, or HMC syndrome, is a very rare syndrome characterized by the combination of hypertelorism, cleft lip and palate and microtia. Associated morphology True Morphologically abnormal structure Inferred relationship Some 4
Multiple malformation syndrome with facial defects as major feature Associated morphology True Morphologically abnormal structure Inferred relationship Some 1
faux hermaphrodite Associated morphology False Morphologically abnormal structure Inferred relationship Some 1
Bilateral deficient infundibula Associated morphology True Morphologically abnormal structure Inferred relationship Some 1
Congenital anomaly of carpal bone (disorder) Associated morphology True Morphologically abnormal structure Inferred relationship Some 1
Nodular embryo Associated morphology False Morphologically abnormal structure Inferred relationship Some 1
Congenital anomaly of gastrointestinal tract Associated morphology True Morphologically abnormal structure Inferred relationship Some 1
Caudal regression syndrome Associated morphology True Morphologically abnormal structure Inferred relationship Some 2
Displacement of Wharton's duct Associated morphology True Morphologically abnormal structure Inferred relationship Some 2
Congenital anomaly of endocrine testis (disorder) Associated morphology True Morphologically abnormal structure Inferred relationship Some 1
Left sided azygos continuation of inferior vena cava to left superior vena cava (disorder) Associated morphology True Morphologically abnormal structure Inferred relationship Some 1
Ataxia-telangiectasia syndrome Associated morphology True Morphologically abnormal structure Inferred relationship Some 2
syndrome d'hypertrichose-faciès acromégaloïde Associated morphology False Morphologically abnormal structure Inferred relationship Some 1
syndrome d'hypertrichose-faciès acromégaloïde Associated morphology False Morphologically abnormal structure Inferred relationship Some 2
14q22q23 microdeletion syndrome is a rare partial deletion of the long arm of chromosome 14 characterized by ocular anomalies (anophthalmia/microphthalmia, ptosis, hypertelorism, exophthalmos), pituitary anomalies (pituitary hypoplasia/aplasia with growth hormone deficiency and growth retardation) and hand/foot anomalies (polydactyly, short digits, pes cavus). Other clinical features may include muscular hypotonia, psychomotor development delay/intellectual disability, dysmorphic signs (facial asymmetry, microretrognathia, high-arched palate, ear anomalies), congenital genitourinary malformations, hearing impairment. Smaller 14q22 deletions may have variable expression. Associated morphology False Morphologically abnormal structure Inferred relationship Some 5
Malformation of throat Associated morphology False Morphologically abnormal structure Inferred relationship Some 1
Phakomatosis spilorosea Associated morphology True Morphologically abnormal structure Inferred relationship Some 1
Phakomatosis spilorosea Associated morphology False Morphologically abnormal structure Inferred relationship Some 3
Phakomatosis spilorosea Associated morphology False Morphologically abnormal structure Inferred relationship Some 2
Congenital umbilical defect Associated morphology True Morphologically abnormal structure Inferred relationship Some 1
Lymphatic malformation Associated morphology True Morphologically abnormal structure Inferred relationship Some 1
Exaggerated cusp of tooth Associated morphology True Morphologically abnormal structure Inferred relationship Some 1
Exaggerated cusp of tooth Associated morphology False Morphologically abnormal structure Inferred relationship Some 2
Coffin-Siris syndrome Associated morphology True Morphologically abnormal structure Inferred relationship Some 1
Ectopic gastric mucosa - multiple sites (disorder) Associated morphology False Morphologically abnormal structure Inferred relationship Some 1
A type of arthrogryposis characterized by congenital cleft palate, microcephaly, craniostenosis and arthrogryposis (limitation of extension of elbows, flexed adducted thumbs, camptodactyly and clubfeet). Additional features include facial dysmorphism (myopathic stiff face, antimongoloid slanting, external ophthalmoplegia, telecanthus, low-set large malrotated ears, open mouth, microgenia and high arched palate). Velopharyngeal insufficiency with difficulties in swallowing, increased secretion of the nose and throat, prominent occiput, generalized muscular hypotonia with mild cyanosis and no spontaneous movements, seizures, torticollis, areflexia, intellectual disability, hypertrichosis of the lower extremities, and scleredema are also observed. The disease often leads to early death. Transmission is autosomal recessive. No new cases have been described since 1983. Associated morphology True Morphologically abnormal structure Inferred relationship Some 1
A type of arthrogryposis characterized by congenital cleft palate, microcephaly, craniostenosis and arthrogryposis (limitation of extension of elbows, flexed adducted thumbs, camptodactyly and clubfeet). Additional features include facial dysmorphism (myopathic stiff face, antimongoloid slanting, external ophthalmoplegia, telecanthus, low-set large malrotated ears, open mouth, microgenia and high arched palate). Velopharyngeal insufficiency with difficulties in swallowing, increased secretion of the nose and throat, prominent occiput, generalized muscular hypotonia with mild cyanosis and no spontaneous movements, seizures, torticollis, areflexia, intellectual disability, hypertrichosis of the lower extremities, and scleredema are also observed. The disease often leads to early death. Transmission is autosomal recessive. No new cases have been described since 1983. Associated morphology True Morphologically abnormal structure Inferred relationship Some 2
Fetal cocaine syndrome (disorder) Associated morphology True Morphologically abnormal structure Inferred relationship Some 1
Lumbar spina bifida with hydrocephalus - open Associated morphology True Morphologically abnormal structure Inferred relationship Some 4
Manifesting female carrier of X-linked muscular dystrophy Associated morphology False Morphologically abnormal structure Inferred relationship Some 2
A rare ectodermal dysplasia syndrome characterized by the association of lower eyelid ectropion, upper eyelid distichiasis, euryblepharon, bilateral cleft lip and palate, and conical teeth. Associated morphology True Morphologically abnormal structure Inferred relationship Some 2
Acropectororenal dysplasia Associated morphology False Morphologically abnormal structure Inferred relationship Some 2
Acropectororenal dysplasia Associated morphology False Morphologically abnormal structure Inferred relationship Some 3
Acropectororenal dysplasia Associated morphology False Morphologically abnormal structure Inferred relationship Some 1
Lack of ossification of metatarsal bone Associated morphology True Morphologically abnormal structure Inferred relationship Some 2
Dislocation of the hip-dysmorphism syndrome is a rare multiple congenital anomalies syndrome characterized by bilateral congenital dislocation of the hip, characteristic facial features (flat mid-face, hypertelorism, epicanthus, puffiness around the eyes, broad nasal bridge, carp-shaped mouth), and joint hyperextensibility. Congenital heart defects, congenital dislocation of the knee, congenital inguinal hernia, and vesicoureteric reflux have also been reported. There have been no further descriptions in the literature since 1995. Associated morphology True Morphologically abnormal structure Inferred relationship Some 2
Congenital malformation syndromes with metabolic disturbances Associated morphology False Morphologically abnormal structure Inferred relationship Some 1
Craniolacunia Associated morphology True Morphologically abnormal structure Inferred relationship Some 1
Craniorachischisis Associated morphology False Morphologically abnormal structure Inferred relationship Some 1
Common atrioventricular junction (disorder) Associated morphology True Morphologically abnormal structure Inferred relationship Some 1
Taenzer's hair Associated morphology True Morphologically abnormal structure Inferred relationship Some 1
Microcephaly-cerebellar hypoplasia-cardiac conduction defect syndrome is a rare, genetic congenital anomalies/dysmorphic syndrome characterized by growth failure, global developmental delay, profound intellectual disability, autistic behaviors, acquired second-degree heart block with bradycardia and vasomotor instability. Hands and feet present with long fusiform fingers, campto-clinodactyly and crowded toes while craniofacial dysmorphism includes microcephaly, broad forehead, thin eyebrows, upslanting palpebral fissures, large ears with prominent antihelix, prominent nose, long philtrum, thin upper lip vermillion and prominent lower lip. Neurological signs include hypotonia, brisk reflexes, dystonic-like movements and truncal ataxia and imaging shows cerebellar hypoplasia and simplified gyral pattern. Associated morphology True Morphologically abnormal structure Inferred relationship Some 3
Persistent tuberculum impar Associated morphology False Morphologically abnormal structure Inferred relationship Some 3
Fetal benzodiazepine syndrome Associated morphology True Morphologically abnormal structure Inferred relationship Some 1
Timothy syndrome is a multi-system disorder with characteristics of cardiac, hand, facial and neurodevelopmental features that include QT prolongation, webbed fingers and toes, flattened nasal bridge, low-set ears, small upper jaw, thin upper lip, and characteristic features of autism or autistic spectrum disorders. Timothy syndrome is caused by mutations in the CACNA1C gene. It is inherited as autosomal dominant trait. Researchers have identified two forms of Timothy syndrome. Type 1, which is also known as the classic type, includes all of the characteristic features described above. Type 2, or the atypical type, causes a more severe form of long QT syndrome and a greater risk of arrhythmia and sudden death. Unlike the classic type, the atypical type does not appear to cause webbing of the fingers or toes. Associated morphology True Morphologically abnormal structure Inferred relationship Some 1

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