• A patient with a congenital claw-like lesion of the finger was studied to determine the nature of the tissue. A variety of biochemical techniques and histological examinations indicated that the lesion was an example of rudimentary polydactyly covered with stratum corneum rather than an accessory nail.
(Arch Dermatol 112:1006-1007, 1976)
Baden HP, Alper JC, Lee LD. Rudimentary Polydactyly Presenting as a Claw. Arch Dermatol. 1976;112(7):1006-1007. doi:10.1001/archderm.1976.01630310064016