Triphalangeal thumb: clinical features and treatment

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...

Congenital split foot (lobster claw) and triphalangeal thumb.

Phenotypic analysis of triphalangeal thumb and associated hand malformations.

Triphalangeal thumb (TPT), a long, finger-like thumb with three phalanges instead of two, is regarded as a subtype of preaxial polydactyly. It can occur as a sporadic disorder, but is more often seen as a dominant familial trait. We describe four white Dutch families in which triphalangeal thumb has variable expression and is sometimes associated with preaxial extra rays, rudimentary postaxial ...

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 ...