On-Top-Plasty for Atypical Thumb Duplication: A Case Report With 10 Year Follow-up.

Pons-Riverola, Albert; Camprubi-Garcia, Eric; Barrera-Ochoa, Sergi; Bergua-Domingo, Josep M; Knorr, Jorge; Soldado, Francisco · Hand (N Y) · 2018

case_report · Level V

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Abstract

A very uncommon pattern of thumb duplication consists of an ulnar-side floating thumb and a radial-side distally hypoplastic thumb. We report the case of a 15-month-old child with this type of thumb duplication on his right hand treated with an on-top-plasty technique. The ulnar-side segment was pedicled and transferred to the lateral thumb, which was distally resected. A well-aligned and widely mobile thumb with a wide first web and an excellent cosmetic appearance was exhibited 10 years after surgery. On-top-plasty technique might be amenable to reconstruct certain atypical thumb duplications.

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