Brachyphalangy

Brachyphalangy is a condition in which one or more of the phalanges of the fingers and toes are smaller than normal.

Brachyphalangy
Other names	Brachyphalangism
Brachyphalangy of the thumb's distal phalanx, also known as brachydactyly type D, with otherwise normal phalanges of the 2nd-5th digits
Symptoms	Having a phalange(s) shorter than average
Usual onset	Birth
Duration	Life-long
Frequency	Exact frequency not known, but brachyphalangy is considered to be rare

This condition is one of the most common non-syndromic causes of brachydactyly and clinodactyly.

Causes

Brachyphalangy of the distal phalange of the thumb

This condition is caused by either fusion or early closure of the phalange's growth plate. One example is brachydactyly type D, which is caused by an early closure of the thumb's distal phalange, leading to a congenitally short thumb with a similarly short and wide thumb nail.