ollicization of the index finger is indicated for surgical correction of Blauth type III, IV, and V congenital thumb hypoplasia. 1 The choice of incision is important because it should satisfy several requirements: a good exposure of the underlying structures resulting in viable skin flaps, a natural aspect of the new thumb, and a supple first web with a wide opening. The scars should be as discreet as possible and have a minimal risk of contraction during long-term follow-up.A variety of skin incisions have been proposed for index pollicization, but to our knowledge, no review summarizes and compares these different approaches. The low number of thumb aplasia cases makes it difficult to easily understand and compare incision sets, for either practical or educational purposes. The aim of this study was to review the different described incisions and to create an anatomical framework to study and compare different incisions in index finger pollicization.