Abstract

Clear cell Hidradenoma, benign tumor, is a large variety of sweet gland tumors which have been described, studied and classified in various way because of histological origin in this tumor. Recent progress in this field of investigation, this tumor comparison with the normal structure of the skin appendages using histochemical and electron microscopic methods is originated from eccrine sweat gland. Microscopically, the general configularion of this tumor is composed of epithelial cells of two types ana presence of occasional tubular lumina lined by glandular epithelium. Therefore the most appropriate name for this distinct cutaneous neoplasm is probably Clear cell Hidradenoma. Also, this tumor is important to differential diagnosis with tumor arising in other adnexal structures, metastatic renal cell carcinoma and primary squamous cell carcinoma of the skin. Authors are experienced of three cases of Clear cell Hidradenoma on the skin of scalp, chest wall and thigh, respectively, from may 1973 to July 1979 on the Han Yang University Hospital. Several histogenetic theories and world's literature are reviewed.