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Thumb hypoplasia grade 3B

MedGen UID:: 1053504
•Concept ID:: CN378293
•: Finding

Synonym:	Hypoplasia of the thumb grade IIIB

HPO:	HP:6000941

Definition

A type of developmental undergrowth of the thumb, whereby there are musculotendinous and osseous deficiencies characterized by basal metacarpal aplasia with deficient carpometacarpal (CMC) joint, and absence of metacarpophalangeal (MCP) or interphalangeal (IP) joint. [from HPO]

Term Hierarchy

GTR
MeSH

CClinical test, RResearch test, OOMIM, GGeneReviews, VClinVar

CROGVThumb hypoplasia grade 3B

Aplasia/hypoplasia involving bones of the extremities
- Aplasia/hypoplasia involving bones of the upper limbs
  - Aplasia/hypoplasia involving bones of the hand
    - Aplasia/Hypoplasia of fingers
      - Aplasia/Hypoplasia of the thumb
        Short thumb
        Thumb hypoplasia grade 3B

Recent clinical studies

Diagnosis

Congenital Great Toe Hypoplasia Equivalent to a Grade 3 Hypoplastic Thumb in a Patient with VACTERL Association.

Mende K, Tonkin MA
J Hand Surg Asian Pac Vol 2018 Dec;23(4):605-606. doi: 10.1142/S2424835518720402. PMID: 30428812

On the classification of congenital thumb hypoplasia.

Tonkin MA
J Hand Surg Eur Vol 2014 Nov;39(9):948-55. Epub 2013 Dec 20 doi: 10.1177/1753193413516246. PMID: 24362256

Supplemental Content

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ClinicalTrials.gov

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