Clubbed thumb

Brachydactyly type D

Top view of a child with asymmetric brachydactyly type D thumb.
Classification and external resources
Side view of a child with asymmetric BDD

"Clubbed thumb" is a misnomer for stub(by) thumb, known clinically as brachydactyly type D, or BDD.[1] BDD is a harmless genetic trait characterized by the last bone of one or both thumbs being short and round with an accompanying short and wide nail bed.

Digital clubbing,[2] however, is a "clinical sign associated with a number of diseases."[3]

Other names

The condition is also sometimes known as potter's thumb or royal thumb but mostly referred to as a stubby thumb.[1]


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