Triphalangeal thumb.

Triphalangeal thumb.

Triphalangeal thumb (TPT), a rare malformation of uncertain pathogenesis, may occur as an isolated defect, in association with other malformations of the hands, or as a feature of a syndrome or sequence. Isolated TPT occurs in two functional types: opposable and non-opposable. The latter appears to be inherited as a simple autosomal dominant trait, while the former is generally sporadic. TPT is...

Triphalangeal thumb in a Bantu family.

its comparative rarity may be indicated by the fact that in a review of the literature for the ensuing fifty-two years (Stieve 1916) only thirty-nine cases were collected. Lapidus, Guidotti and Coletti (1943) discovered six cases while examining 75,000 men drafted to an American Army centre. These workers quoted a statement by Dr M. Pomeranz. radiologist of the Hospital for Joint Diseases in Ne...

Isolated Bilateral Triphalangeal Thumb with Delta Phalanx: A Case Report

Triphalangeal thumb is characterized by the interposition of an extra-phalanx between two normal ones. In this article the authors present the case of a 24-year-old man with bilateral triphalangeal thumb of opposable type, without any other associated anomaly or genetic syndrome. The patient had triangular delta extra-phalanxes that caused ulnar deviation of both thumbs. Surgical procedure for ...

Congenital split foot (lobster claw) and triphalangeal thumb.

Non-opposable triphalangeal thumb in an Italian family.

This report describes a family with bilateral non-opposable triphalangeal thumb, bringing to two the number of families with this autosomal dominant disorder.