Abstract
Malignant proliferating trichilemmal tumor (MPTT) is a dermal adnexal tumor originated from the external root sheath of hair follicles. In this article, we reported a rare case of auricular MPTT in a 65-year-old male with gradually enlarging and bleeding mass on the right auricle measuring 30 × 20 × 12mm in size and detailed the surgical strategy for therapy. The diagnosis of MPTT was established primarily by histopathological observation with abrupt keratinization, cytological atypia, abnormal mitoses, and infiltrating margins. Following extensive excision, no recurrence was noted for 14months. We also discuss its clinicopathological features, differential diagnoses, and treatment methods and review the relevant literature in this regard.
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