Brachydactyly type B

Brachydactyly type B (BDB) is a very rare congenital malformation characterized by hypoplasia or aplasia of the terminal parts of fingers 2 to 5, with complete absence of the fingernails.

Syndactyly

Webbing or fusion of the fingers or toes, involving soft parts only or including bone structure. Bony fusions are referred to as \"bony\" syndactyly if the fusion occurs in a radio-ulnar axis. Fusions of bones of the fingers or toes in a proximo-distal axis are referred to as \"symphalangism\".


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PMID (PMCID)
10457848
 MALE Infant, Newborn
Brachydactyly type B: case report and further evidence for clinical heterogeneity.
Slavotinek A, Clayton-Smith J.
Clin Dysmorphol. 1999;8(3):165-71.
Although other digital anomalies have previously been described with brachydactyly type B, the absent digit, atypical syndactyly and marked asymmetry in this child make this case a good illustration of the clinical heterogeneity that can be associated with this type of brachdactyly.