【Objective】 To analyze the clinical and histopathologic features of trichilemmal carcinoma

and show the differences between trichilemmal carcinoma and other malignant tumors of skin. 【Methods】 We collected 14 cases of trichilemmal carcinoma to collect clinical information and observe the morphology. 【Results】 The mean age of the patients was 45.5 years (range 22-72 years). There were four males and ten females. In each case

lesions were limited to the head and neck. Macroscopically

solitary nodules were observed. Most of cases were homogeneous solid

only one of the cases was cystic. Histologically

invasive lobular proliferations of prominent atypical clear cells lacking of intercellular bridge were noted emanating from follicular epithelia and the epidermis. And foci of trichilemmal keratinization were identified in the majority of cases. 【Conclusion】 Trichilemmal carcinoma have unique clinical and histopathologic features that distinguished it from other malignant tumors of skin such as squamous cell carcinoma.