IMMUNOHISTOLOGICAL STUDIES OF AN ONCOCYTOMA

An oncocytoma of the upper eyelid that occurred in an 82-year-old male was studied immunohistologically according to the avidin-biotin-perox idase complex method (secretory component, carbohydrate antigen 19-9, carcinoembryonic antigen, anticytokeratin AE1/AE3, S-100 protein, myog lobin, actin, vimentin). The staining properties of columnar-type onco cytes were the same as those of epithelial cells of excretory ducts of Moll's gland, but those of polygonal-type oncocytes were similar to t hose of myoepithelial cells of Moll's gland. Our results suggested tha t excretory duct epithelial cells of Moll's gland are the origin of on cocytoma of the eyelid.