The Stensen's duct line: A landmark in parotid duct and gland injury and surgery. A prospective anatomical, clinical and radiological study.

Introduction: The parotid duct (PD) is often involved in parotid gland diseases. A skin landmark could help the surgeon to locate its position. The parotid duct line (PDL) joins the tragus-antitragus point to the middle of the half upper lip.