Neurilemmoma Masquerading a Dermoid Cyst at the Inferior Mandibular Margin: An Unusual Clinical Occurrence

Key Clinical Message Neurilemmomas in the submental and submandibular region represent a diagnostic challenge, often mimicking more common superficial cysts. This is a case of neurilemmoma of the marginal mandibular branch of the facial nerve, initially diagnosed as a dermoid cyst via ultrasonography in a 65‐year‐old male with an 18‐month history of a painless 1.5‐cm mass. Histopathological examination of the excised lesion confirmed neurilemmoma. The mass was encapsulated and easily detached from the surrounding tissue; thus, successful excision without postoperative neurological deficits was ensured.