Shark island flap for reconstruction of nasal ala-perinasal defects.

The main objective in dermatologic surgery is complete excision of the tumor whilst achieving the best possible functional and cosmetic outcome. In addition, we must take into account age, sex, and tumor size and site. We should also consider the patient’s expectations, the preservation of the different cosmetic units, and the final cosmetic outcome. The external nose is a facial esthetic unit that is divided into a number of cosmetic subunits that have a similar color, texture, and volume. The ala nasi and the perialar region are anatomical areas that are commonly affected by neoplastic skin disease. This is a concave region at the confluence of the ala nasi, the lateral wall of the nose, the cheek, and the upper region of the lip. Its reconstruction is a challenge for the dermatologic surgeon, as poor planning of the technique can alter the alar sulcus, nasal symmetry, and the morphology of adjacent