A Case of Malignant Proliferating Trichilemmal Tumor with Spindle Cell Carcinoma

Proliferating trichilemmal cyst(proliferating trchilemmal tumor, PTC) most commonly occurs in the scalp and is generally benign. Malignant transformation of PTC is rare, and the appearance of a spindle cell(sarcomatoid) carcinoma is extremely rare. The authors experienced a case of malignant proliferating trchilemmal tumor with spindle cell carcinoma on the scalp in a 41-year-old male. The tumor was widely resected and covered with split thickness skin graft after Terudermis(R) graft. Imaging studies and fine needle aspiration cytology showed no regional lymph node involvement or distant matastasis.