1078031000119108: Juvenile osteochondrosis of right tarsal navicular (disorder)

SNOMED CT Concept\Clinical finding (finding)\...

\Finding of limb structure (finding)\Disorder of limb\Disorder of lower limb\Disorder of right lower extremity (disorder)\Juvenile osteochondrosis of right tarsus (disorder)\Juvenile osteochondrosis of right tarsal navicular (disorder)
\Finding of limb structure (finding)\Disorder of limb\Disorder of lower limb\Disorder of free lower limb (disorder)\Disorder of foot (disorder)\Juvenile osteochondrosis of right tarsus (disorder)\Juvenile osteochondrosis of right tarsal navicular (disorder)
\Finding of limb structure (finding)\Disorder of limb\Disorder of lower limb\Disorder of free lower limb (disorder)\Disorder of foot (disorder)\Juvenile osteochondrosis of the foot (disorder)\Juvenile osteochondrosis of tarsus (disorder)\Juvenile osteochondrosis of right tarsal navicular (disorder)
\Finding of limb structure (finding)\Disorder of limb\Disorder of lower limb\Disorder of free lower limb (disorder)\Disorder of foot (disorder)\Juvenile osteochondrosis of the foot (disorder)\Juvenile osteochondrosis of tarsal navicular\Juvenile osteochondrosis of right tarsal navicular (disorder)
\Finding of limb structure (finding)\Disorder of limb\Disorder of lower limb\Juvenile osteochondrosis of lower extremity\Juvenile osteochondrosis of right tarsus (disorder)\Juvenile osteochondrosis of right tarsal navicular (disorder)
\Finding of limb structure (finding)\Disorder of limb\Disorder of lower limb\Juvenile osteochondrosis of lower extremity\Juvenile osteochondrosis of the foot (disorder)\Juvenile osteochondrosis of tarsus (disorder)\Juvenile osteochondrosis of right tarsal navicular (disorder)
\Finding of limb structure (finding)\Disorder of limb\Disorder of lower limb\Juvenile osteochondrosis of lower extremity\Juvenile osteochondrosis of the foot (disorder)\Juvenile osteochondrosis of tarsal navicular\Juvenile osteochondrosis of right tarsal navicular (disorder)
\Finding of limb structure (finding)\Finding of lower limb (finding)\Finding of bone of lower limb (finding)\Juvenile osteochondrosis of lower extremity\Juvenile osteochondrosis of right tarsus (disorder)\Juvenile osteochondrosis of right tarsal navicular (disorder)
\Finding of limb structure (finding)\Finding of lower limb (finding)\Finding of bone of lower limb (finding)\Juvenile osteochondrosis of lower extremity\Juvenile osteochondrosis of the foot (disorder)\Juvenile osteochondrosis of tarsus (disorder)\Juvenile osteochondrosis of right tarsal navicular (disorder)
\Finding of limb structure (finding)\Finding of lower limb (finding)\Finding of bone of lower limb (finding)\Juvenile osteochondrosis of lower extremity\Juvenile osteochondrosis of the foot (disorder)\Juvenile osteochondrosis of tarsal navicular\Juvenile osteochondrosis of right tarsal navicular (disorder)
\Finding of limb structure (finding)\Finding of lower limb (finding)\Finding of bone of lower limb (finding)\Finding of bone of foot\Juvenile osteochondrosis of right tarsus (disorder)\Juvenile osteochondrosis of right tarsal navicular (disorder)
\Finding of limb structure (finding)\Finding of lower limb (finding)\Finding of bone of lower limb (finding)\Finding of bone of foot\Juvenile osteochondrosis of the foot (disorder)\Juvenile osteochondrosis of tarsus (disorder)\Juvenile osteochondrosis of right tarsal navicular (disorder)
\Finding of limb structure (finding)\Finding of lower limb (finding)\Finding of bone of lower limb (finding)\Finding of bone of foot\Juvenile osteochondrosis of the foot (disorder)\Juvenile osteochondrosis of tarsal navicular\Juvenile osteochondrosis of right tarsal navicular (disorder)
\Finding of limb structure (finding)\Finding of lower limb (finding)\Finding of ankle or foot (finding)\Finding of foot region\Finding of bone of foot\Juvenile osteochondrosis of right tarsus (disorder)\Juvenile osteochondrosis of right tarsal navicular (disorder)
\Finding of limb structure (finding)\Finding of lower limb (finding)\Finding of ankle or foot (finding)\Finding of foot region\Finding of bone of foot\Juvenile osteochondrosis of the foot (disorder)\Juvenile osteochondrosis of tarsus (disorder)\Juvenile osteochondrosis of right tarsal navicular (disorder)
\Finding of limb structure (finding)\Finding of lower limb (finding)\Finding of ankle or foot (finding)\Finding of foot region\Finding of bone of foot\Juvenile osteochondrosis of the foot (disorder)\Juvenile osteochondrosis of tarsal navicular\Juvenile osteochondrosis of right tarsal navicular (disorder)
\Finding of limb structure (finding)\Finding of lower limb (finding)\Finding of ankle or foot (finding)\Finding of foot region\Disorder of foot (disorder)\Juvenile osteochondrosis of right tarsus (disorder)\Juvenile osteochondrosis of right tarsal navicular (disorder)
\Finding of limb structure (finding)\Finding of lower limb (finding)\Finding of ankle or foot (finding)\Finding of foot region\Disorder of foot (disorder)\Juvenile osteochondrosis of the foot (disorder)\Juvenile osteochondrosis of tarsus (disorder)\Juvenile osteochondrosis of right tarsal navicular (disorder)
\Finding of limb structure (finding)\Finding of lower limb (finding)\Finding of ankle or foot (finding)\Finding of foot region\Disorder of foot (disorder)\Juvenile osteochondrosis of the foot (disorder)\Juvenile osteochondrosis of tarsal navicular\Juvenile osteochondrosis of right tarsal navicular (disorder)
\Finding of limb structure (finding)\Finding of lower limb (finding)\Disorder of lower limb\Disorder of right lower extremity (disorder)\Juvenile osteochondrosis of right tarsus (disorder)\Juvenile osteochondrosis of right tarsal navicular (disorder)
\Finding of limb structure (finding)\Finding of lower limb (finding)\Disorder of lower limb\Disorder of free lower limb (disorder)\Disorder of foot (disorder)\Juvenile osteochondrosis of right tarsus (disorder)\Juvenile osteochondrosis of right tarsal navicular (disorder)
\Finding of limb structure (finding)\Finding of lower limb (finding)\Disorder of lower limb\Disorder of free lower limb (disorder)\Disorder of foot (disorder)\Juvenile osteochondrosis of the foot (disorder)\Juvenile osteochondrosis of tarsus (disorder)\Juvenile osteochondrosis of right tarsal navicular (disorder)
\Finding of limb structure (finding)\Finding of lower limb (finding)\Disorder of lower limb\Disorder of free lower limb (disorder)\Disorder of foot (disorder)\Juvenile osteochondrosis of the foot (disorder)\Juvenile osteochondrosis of tarsal navicular\Juvenile osteochondrosis of right tarsal navicular (disorder)
\Finding of limb structure (finding)\Finding of lower limb (finding)\Disorder of lower limb\Juvenile osteochondrosis of lower extremity\Juvenile osteochondrosis of right tarsus (disorder)\Juvenile osteochondrosis of right tarsal navicular (disorder)
\Finding of limb structure (finding)\Finding of lower limb (finding)\Disorder of lower limb\Juvenile osteochondrosis of lower extremity\Juvenile osteochondrosis of the foot (disorder)\Juvenile osteochondrosis of tarsus (disorder)\Juvenile osteochondrosis of right tarsal navicular (disorder)
\Finding of limb structure (finding)\Finding of lower limb (finding)\Disorder of lower limb\Juvenile osteochondrosis of lower extremity\Juvenile osteochondrosis of the foot (disorder)\Juvenile osteochondrosis of tarsal navicular\Juvenile osteochondrosis of right tarsal navicular (disorder)

\Musculoskeletal finding (finding)\Bone finding\Finding of bone of lower limb (finding)\Juvenile osteochondrosis of lower extremity\Juvenile osteochondrosis of right tarsus (disorder)\Juvenile osteochondrosis of right tarsal navicular (disorder)
\Musculoskeletal finding (finding)\Bone finding\Finding of bone of lower limb (finding)\Juvenile osteochondrosis of lower extremity\Juvenile osteochondrosis of the foot (disorder)\Juvenile osteochondrosis of tarsus (disorder)\Juvenile osteochondrosis of right tarsal navicular (disorder)
\Musculoskeletal finding (finding)\Bone finding\Finding of bone of lower limb (finding)\Juvenile osteochondrosis of lower extremity\Juvenile osteochondrosis of the foot (disorder)\Juvenile osteochondrosis of tarsal navicular\Juvenile osteochondrosis of right tarsal navicular (disorder)
\Musculoskeletal finding (finding)\Bone finding\Finding of bone of lower limb (finding)\Finding of bone of foot\Juvenile osteochondrosis of right tarsus (disorder)\Juvenile osteochondrosis of right tarsal navicular (disorder)
\Musculoskeletal finding (finding)\Bone finding\Finding of bone of lower limb (finding)\Finding of bone of foot\Juvenile osteochondrosis of the foot (disorder)\Juvenile osteochondrosis of tarsus (disorder)\Juvenile osteochondrosis of right tarsal navicular (disorder)
\Musculoskeletal finding (finding)\Bone finding\Finding of bone of lower limb (finding)\Finding of bone of foot\Juvenile osteochondrosis of the foot (disorder)\Juvenile osteochondrosis of tarsal navicular\Juvenile osteochondrosis of right tarsal navicular (disorder)
\Musculoskeletal finding (finding)\Bone finding\Disorder of bone (disorder)\Disorder of bone development\Juvenile osteochondrosis of lower extremity\Juvenile osteochondrosis of right tarsus (disorder)\Juvenile osteochondrosis of right tarsal navicular (disorder)
\Musculoskeletal finding (finding)\Bone finding\Disorder of bone (disorder)\Disorder of bone development\Juvenile osteochondrosis of lower extremity\Juvenile osteochondrosis of the foot (disorder)\Juvenile osteochondrosis of tarsus (disorder)\Juvenile osteochondrosis of right tarsal navicular (disorder)
\Musculoskeletal finding (finding)\Bone finding\Disorder of bone (disorder)\Disorder of bone development\Juvenile osteochondrosis of lower extremity\Juvenile osteochondrosis of the foot (disorder)\Juvenile osteochondrosis of tarsal navicular\Juvenile osteochondrosis of right tarsal navicular (disorder)
\Musculoskeletal finding (finding)\Bone finding\Disorder of bone (disorder)\Degenerative disorder of bone\Juvenile osteochondrosis of right tarsus (disorder)\Juvenile osteochondrosis of right tarsal navicular (disorder)
\Musculoskeletal finding (finding)\Bone finding\Disorder of bone (disorder)\Degenerative disorder of bone\Juvenile osteochondrosis of the foot (disorder)\Juvenile osteochondrosis of tarsus (disorder)\Juvenile osteochondrosis of right tarsal navicular (disorder)
\Musculoskeletal finding (finding)\Bone finding\Disorder of bone (disorder)\Degenerative disorder of bone\Juvenile osteochondrosis of the foot (disorder)\Juvenile osteochondrosis of tarsal navicular\Juvenile osteochondrosis of right tarsal navicular (disorder)
\Musculoskeletal finding (finding)\Disorder of musculoskeletal system (disorder)\Degenerative disorder of musculoskeletal system (disorder)\Degenerative disorder of bone\Juvenile osteochondrosis of right tarsus (disorder)\Juvenile osteochondrosis of right tarsal navicular (disorder)
\Musculoskeletal finding (finding)\Disorder of musculoskeletal system (disorder)\Degenerative disorder of musculoskeletal system (disorder)\Degenerative disorder of bone\Juvenile osteochondrosis of the foot (disorder)\Juvenile osteochondrosis of tarsus (disorder)\Juvenile osteochondrosis of right tarsal navicular (disorder)
\Musculoskeletal finding (finding)\Disorder of musculoskeletal system (disorder)\Degenerative disorder of musculoskeletal system (disorder)\Degenerative disorder of bone\Juvenile osteochondrosis of the foot (disorder)\Juvenile osteochondrosis of tarsal navicular\Juvenile osteochondrosis of right tarsal navicular (disorder)
\Musculoskeletal finding (finding)\Disorder of musculoskeletal system (disorder)\Disorder of skeletal system\Disorder of bone (disorder)\Disorder of bone development\Juvenile osteochondrosis of lower extremity\Juvenile osteochondrosis of right tarsus (disorder)\Juvenile osteochondrosis of right tarsal navicular (disorder)
\Musculoskeletal finding (finding)\Disorder of musculoskeletal system (disorder)\Disorder of skeletal system\Disorder of bone (disorder)\Disorder of bone development\Juvenile osteochondrosis of lower extremity\Juvenile osteochondrosis of the foot (disorder)\Juvenile osteochondrosis of tarsus (disorder)\Juvenile osteochondrosis of right tarsal navicular (disorder)
\Musculoskeletal finding (finding)\Disorder of musculoskeletal system (disorder)\Disorder of skeletal system\Disorder of bone (disorder)\Disorder of bone development\Juvenile osteochondrosis of lower extremity\Juvenile osteochondrosis of the foot (disorder)\Juvenile osteochondrosis of tarsal navicular\Juvenile osteochondrosis of right tarsal navicular (disorder)
\Musculoskeletal finding (finding)\Disorder of musculoskeletal system (disorder)\Disorder of skeletal system\Disorder of bone (disorder)\Degenerative disorder of bone\Juvenile osteochondrosis of right tarsus (disorder)\Juvenile osteochondrosis of right tarsal navicular (disorder)
\Musculoskeletal finding (finding)\Disorder of musculoskeletal system (disorder)\Disorder of skeletal system\Disorder of bone (disorder)\Degenerative disorder of bone\Juvenile osteochondrosis of the foot (disorder)\Juvenile osteochondrosis of tarsus (disorder)\Juvenile osteochondrosis of right tarsal navicular (disorder)
\Musculoskeletal finding (finding)\Disorder of musculoskeletal system (disorder)\Disorder of skeletal system\Disorder of bone (disorder)\Degenerative disorder of bone\Juvenile osteochondrosis of the foot (disorder)\Juvenile osteochondrosis of tarsal navicular\Juvenile osteochondrosis of right tarsal navicular (disorder)

\Disease\Degenerative disorder\Degenerative disorder of musculoskeletal system (disorder)\Degenerative disorder of bone\Juvenile osteochondrosis of right tarsus (disorder)\Juvenile osteochondrosis of right tarsal navicular (disorder)
\Disease\Degenerative disorder\Degenerative disorder of musculoskeletal system (disorder)\Degenerative disorder of bone\Juvenile osteochondrosis of the foot (disorder)\Juvenile osteochondrosis of tarsus (disorder)\Juvenile osteochondrosis of right tarsal navicular (disorder)
\Disease\Degenerative disorder\Degenerative disorder of musculoskeletal system (disorder)\Degenerative disorder of bone\Juvenile osteochondrosis of the foot (disorder)\Juvenile osteochondrosis of tarsal navicular\Juvenile osteochondrosis of right tarsal navicular (disorder)
\Disease\Disorder of body system\Disorder of musculoskeletal system (disorder)\Degenerative disorder of musculoskeletal system (disorder)\Degenerative disorder of bone\Juvenile osteochondrosis of right tarsus (disorder)\Juvenile osteochondrosis of right tarsal navicular (disorder)
\Disease\Disorder of body system\Disorder of musculoskeletal system (disorder)\Degenerative disorder of musculoskeletal system (disorder)\Degenerative disorder of bone\Juvenile osteochondrosis of the foot (disorder)\Juvenile osteochondrosis of tarsus (disorder)\Juvenile osteochondrosis of right tarsal navicular (disorder)
\Disease\Disorder of body system\Disorder of musculoskeletal system (disorder)\Degenerative disorder of musculoskeletal system (disorder)\Degenerative disorder of bone\Juvenile osteochondrosis of the foot (disorder)\Juvenile osteochondrosis of tarsal navicular\Juvenile osteochondrosis of right tarsal navicular (disorder)
\Disease\Disorder of body system\Disorder of musculoskeletal system (disorder)\Disorder of skeletal system\Disorder of bone (disorder)\Disorder of bone development\Juvenile osteochondrosis of lower extremity\Juvenile osteochondrosis of right tarsus (disorder)\Juvenile osteochondrosis of right tarsal navicular (disorder)
\Disease\Disorder of body system\Disorder of musculoskeletal system (disorder)\Disorder of skeletal system\Disorder of bone (disorder)\Disorder of bone development\Juvenile osteochondrosis of lower extremity\Juvenile osteochondrosis of the foot (disorder)\Juvenile osteochondrosis of tarsus (disorder)\Juvenile osteochondrosis of right tarsal navicular (disorder)
\Disease\Disorder of body system\Disorder of musculoskeletal system (disorder)\Disorder of skeletal system\Disorder of bone (disorder)\Disorder of bone development\Juvenile osteochondrosis of lower extremity\Juvenile osteochondrosis of the foot (disorder)\Juvenile osteochondrosis of tarsal navicular\Juvenile osteochondrosis of right tarsal navicular (disorder)
\Disease\Disorder of body system\Disorder of musculoskeletal system (disorder)\Disorder of skeletal system\Disorder of bone (disorder)\Degenerative disorder of bone\Juvenile osteochondrosis of right tarsus (disorder)\Juvenile osteochondrosis of right tarsal navicular (disorder)
\Disease\Disorder of body system\Disorder of musculoskeletal system (disorder)\Disorder of skeletal system\Disorder of bone (disorder)\Degenerative disorder of bone\Juvenile osteochondrosis of the foot (disorder)\Juvenile osteochondrosis of tarsus (disorder)\Juvenile osteochondrosis of right tarsal navicular (disorder)
\Disease\Disorder of body system\Disorder of musculoskeletal system (disorder)\Disorder of skeletal system\Disorder of bone (disorder)\Degenerative disorder of bone\Juvenile osteochondrosis of the foot (disorder)\Juvenile osteochondrosis of tarsal navicular\Juvenile osteochondrosis of right tarsal navicular (disorder)
\Disease\Disorder of limb\Disorder of lower limb\Disorder of right lower extremity (disorder)\Juvenile osteochondrosis of right tarsus (disorder)\Juvenile osteochondrosis of right tarsal navicular (disorder)
\Disease\Disorder of limb\Disorder of lower limb\Disorder of free lower limb (disorder)\Disorder of foot (disorder)\Juvenile osteochondrosis of right tarsus (disorder)\Juvenile osteochondrosis of right tarsal navicular (disorder)
\Disease\Disorder of limb\Disorder of lower limb\Disorder of free lower limb (disorder)\Disorder of foot (disorder)\Juvenile osteochondrosis of the foot (disorder)\Juvenile osteochondrosis of tarsus (disorder)\Juvenile osteochondrosis of right tarsal navicular (disorder)
\Disease\Disorder of limb\Disorder of lower limb\Disorder of free lower limb (disorder)\Disorder of foot (disorder)\Juvenile osteochondrosis of the foot (disorder)\Juvenile osteochondrosis of tarsal navicular\Juvenile osteochondrosis of right tarsal navicular (disorder)
\Disease\Disorder of limb\Disorder of lower limb\Juvenile osteochondrosis of lower extremity\Juvenile osteochondrosis of right tarsus (disorder)\Juvenile osteochondrosis of right tarsal navicular (disorder)
\Disease\Disorder of limb\Disorder of lower limb\Juvenile osteochondrosis of lower extremity\Juvenile osteochondrosis of the foot (disorder)\Juvenile osteochondrosis of tarsus (disorder)\Juvenile osteochondrosis of right tarsal navicular (disorder)
\Disease\Disorder of limb\Disorder of lower limb\Juvenile osteochondrosis of lower extremity\Juvenile osteochondrosis of the foot (disorder)\Juvenile osteochondrosis of tarsal navicular\Juvenile osteochondrosis of right tarsal navicular (disorder)
\Disease\Developmental disorder (disorder)\Disorder of bone development\Juvenile osteochondrosis of lower extremity\Juvenile osteochondrosis of right tarsus (disorder)\Juvenile osteochondrosis of right tarsal navicular (disorder)
\Disease\Developmental disorder (disorder)\Disorder of bone development\Juvenile osteochondrosis of lower extremity\Juvenile osteochondrosis of the foot (disorder)\Juvenile osteochondrosis of tarsus (disorder)\Juvenile osteochondrosis of right tarsal navicular (disorder)
\Disease\Developmental disorder (disorder)\Disorder of bone development\Juvenile osteochondrosis of lower extremity\Juvenile osteochondrosis of the foot (disorder)\Juvenile osteochondrosis of tarsal navicular\Juvenile osteochondrosis of right tarsal navicular (disorder)

Status: current, Sufficiently defined by necessary conditions definition status (core metadata concept). Date: 31-Jan 2018. Module: SNOMED CT core

Descriptions:

Id Description Lang Type Status Case? Module

3526522017 Juvenile osteochondrosis of right tarsal navicular (disorder) en Fully specified name Active Entire term case insensitive (core metadata concept) SNOMED CT core

3526523010 Juvenile osteochondrosis of right tarsal navicular en Synonym (core metadata concept) Active Entire term case insensitive (core metadata concept) SNOMED CT core

3526522017 Juvenile osteochondrosis of right tarsal navicular (disorder) en Fully specified name Active Entire term case insensitive (core metadata concept) SNOMED CT core

3526523010 Juvenile osteochondrosis of right tarsal navicular en Synonym (core metadata concept) Active Entire term case insensitive (core metadata concept) SNOMED CT core

5621861000241118 ostéochondrose juvénile de l'os naviculaire droit fr Synonym (core metadata concept) Active Entire term case insensitive (core metadata concept) SNOMED CT Switzerland NRC maintained Module

5621861000241118 ostéochondrose juvénile de l'os naviculaire droit fr Synonym (core metadata concept) Active Entire term case insensitive (core metadata concept) SNOMED CT Switzerland NRC maintained Module

Expanded Value Set

Outbound Relationships	Type	Target	Active	Characteristic	Refinability	Group	Values
Juvenile osteochondrosis of right tarsal navicular (disorder)	Is a	Juvenile osteochondrosis of tarsal navicular	true	Inferred relationship	Existential restriction modifier (core metadata concept)
Juvenile osteochondrosis of right tarsal navicular (disorder)	Occurrence	Childhood	true	Inferred relationship	Existential restriction modifier (core metadata concept)	1
Juvenile osteochondrosis of right tarsal navicular (disorder)	Associated morphology	Degenerative abnormality (morphologic abnormality)	true	Inferred relationship	Existential restriction modifier (core metadata concept)	4
Juvenile osteochondrosis of right tarsal navicular (disorder)	Finding site	Bone structure of right navicular (body structure)	true	Inferred relationship	Existential restriction modifier (core metadata concept)	4
Juvenile osteochondrosis of right tarsal navicular (disorder)	Associated morphology	anomalie du développement	false	Inferred relationship	Existential restriction modifier (core metadata concept)	5
Juvenile osteochondrosis of right tarsal navicular (disorder)	Finding site	Bone structure of lower limb	false	Inferred relationship	Existential restriction modifier (core metadata concept)	5
Juvenile osteochondrosis of right tarsal navicular (disorder)	Is a	Juvenile osteochondrosis of right tarsus (disorder)	true	Inferred relationship	Existential restriction modifier (core metadata concept)
Juvenile osteochondrosis of right tarsal navicular (disorder)	Associated morphology	Morphologically abnormal structure	false	Inferred relationship	Existential restriction modifier (core metadata concept)	2
Juvenile osteochondrosis of right tarsal navicular (disorder)	Pathological process (attribute)	Pathological developmental process (qualifier value)	false	Inferred relationship	Existential restriction modifier (core metadata concept)	2
Juvenile osteochondrosis of right tarsal navicular (disorder)	Finding site	Bone structure	false	Inferred relationship	Existential restriction modifier (core metadata concept)	2
Juvenile osteochondrosis of right tarsal navicular (disorder)	Finding site	Bone structure of lower limb	true	Inferred relationship	Existential restriction modifier (core metadata concept)	3
Juvenile osteochondrosis of right tarsal navicular (disorder)	Pathological process (attribute)	Pathological developmental process (qualifier value)	true	Inferred relationship	Existential restriction modifier (core metadata concept)	3
Juvenile osteochondrosis of right tarsal navicular (disorder)	Associated morphology	Morphologically abnormal structure	true	Inferred relationship	Existential restriction modifier (core metadata concept)	3
Juvenile osteochondrosis of right tarsal navicular (disorder)	Is a	Juvenile osteochondrosis of tarsus (disorder)	true	Inferred relationship	Existential restriction modifier (core metadata concept)

Inbound Relationships

Type

Active

Source

Characteristic

Refinability

Group

Reference Sets