Brachydactyly type C

Brachydactyly type C (BDC) is a very rare congenital malformation characterized by brachymesophalangy of the index, middle and little fingers, with hyperphalangy of the index and middle finger and shortening of the 1st metacarpal. Only few families with BDC have been reported in the literature. The ring finger is usually the longest digit. Short metacarpals and symphalangism are occasionally present. Heterozygous mutations in the cartilage-derived morphogenetic protein 1, also known as growth/differentiation factor-5 gene (<i>GDF5</i>), have been reported in BDC patients. Many studies support an autosomal dominant mode of inheritance.

Triangular epiphyses



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PMID (PMCID)
15565340
FEMALE Infant, Newborn
Angel-shaped phalanges in brachydactyly C: a case report, and speculation on pathogenesis.
Castriota-Scanderbeg A, Garaci FG, Beluffi G.
Pediatr Radiol. 2005;35(5):535-8.
We describe a woman and her daughter affected by brachydactyly type C. The unusual feature in the child included the striking 'angel-shaped' appearance of the proximal phalanges of the index and middle fingers of one hand, whereas more typical triangular epiphyses with elongation of their radial side were present at the same location in the opposite hand.