CLINICO-PATHLOGICAL STUDY ON EPIDERMAL AND TRICHILEMMAL CYSTS

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  • 粉瘤症例の検討

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A total of 402 cases of so-called atheroma including 391 of epidermal cyst (EC) and 11 of trichilemmal cyst (TC) treated at the institution during the past 21 years and 5 months were enrolled in this study. No annual changes in new cases of atheroma were observed during the past 21 years, and about 85% of all EC patients were treated in the surgical, dermatological and orthopedic departments in the hospital, EC commonly occurred in middle aged male population, and the male-to-female ratio was approximately 2 to 1. In about 60% of the EC patients the disease affected the face, neck, and back. An averaged age (20.9±10.2 years old) of patients whose plantar regions were affected by EC was significantly younger than that (47.2±16.8) of those whose lesions were in anywhere except the plantar regions (p<0.0001). TC accounted for about 2.7% of all atheromas. Contrary to EC, there were significantly more female patients among TC patients (P=0.037), and TC commonly affected the head (P<0.0001).

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