Applications of the crescentic advancement flap.

Repair of defects of the lateral nose, perialar, and nasolabial region are often challenging. Maintaining the normal anatomic boundary lines and if possible placing the sutures within these lines are important considerations when designing a closure. The crescentic advancement flap has proved to be a versatile closure for skin cancer defects in these regions. A brief historic perspective on this flap along with important concepts in its utilization for defects of the lateral nose, perialar region, and nasolabial fold are discussed.