Brachydactyly type D

Brachydactyly type D
Other namesClubbed thumb, thumb head, short thumb, potter's thumb, royal thumb, murderer's thumb, hammer thumb, stubbed thumb, stub thumb
Unilateral brachydactyly type D in an adolescent female
X-ray of a regular thumb (left) and a thumb with brachydactyly type D (right) showing distal phalange brachyphalangy of said thumb.
SpecialtyMedical genetics

Brachydactyly type D, also known as murderer's thumb, stubbed thumb, spoon thumb, power thumb or short thumb, is a genetic trait recognised by a thumb being relatively short and round with an accompanying wider nail bed. The distal phalanx of such thumbs is approximately two-thirds the length of full-length thumbs. It is the most common type of shortness of digits (brachydactyly), affecting approximately 2% of the population. It is associated with the HOXD13 gene, located on chromosome 2q31.1.

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