Ten cases of adenocarcinoma of the endometrium were studied using histochemical methods for mucopolysaccharides and immunocytochemical methods for the localization of various markers, such as EMA (epithelial membrane antigen), GCDFP-15 (gross cystic disease fluid protein) and CEA. Four cases appeared to contain High Iron Diamine-positive substance and 6 cases were positive using an immunocytochemical method with a polyclonal anti-CEA antiserum. In contrast, no cases stained when a monoclonal anti-CEA antiserum was employed. This suggested that HID-positive material could be a sign of differentiation towards cells with a secretive function.
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