Proliferating pilar tumors are rare, benign, exophytic neoplasms, which can closely resemble a squamous cell carcinoma. We describe a patient with a large benign exophytic tumor on the scalp that had been slowly growing over 10 years. While this class of benign follicular tumors is rare, the standard of care is typically excision with clear histologic margins. In this case, this large scalp tumor was surgically excised with clear margins/permanent section margin control using "Slow Mohs" technique, with subsequent repair using a skin substitute dressing, followed by a delayed skin graft.
Keywords: Mohs micrographic surgery; Proliferating pilar tumor; Slow Mohs; benign; proliferating trichilemmal tumor.
© The Author(s) 2023.