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KMID : 0361020010440091010
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Korean Journal of Otolaryngology - Head and Neck Surgery
2001 Volume.44 No. 9 p.1010 ~ p.1013
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A Case of Malignant Proliferating Trichilemmal Tumor Occurring in Lower Lip
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김영모/Young Mo Kim
조정일/이명택/이충재/Jung Il Cho/Myung Taek Lee/Chung Jae Lee
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Abstract
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Proliferating trichilemmal tumor is one of rare benign tumors originating from the outer root of the hair follicle sheath. The tumor is clinically benign, although it can display nuclear atypia, dyskeratotic cells, and mitotic figures. These
features
can be misleading, and a false diagnosis of ta squamous cell carcinoma is possible. An abrupt enlargement of size is suggestive of malignant changes of the tumor. We report a case of a malignant proliferting trichilemmal tumor which occurred not
on
the
scalp but on the lower lip. A 75-year-old man presented a lower lip mass with a smooth surface, measuring 4.5×3 cm, and his right submandibular lymph node was also palpable. The tumor was widely excised with bilateral functional neck dissection,
and
the defect on the lip was reconstructed using radial forearm free flap including the palmaris longus tendon. No recurrence was observed during the follow-up period.
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