forty-nine biopsy specimens of nasopharyngeal carcinoma and 20 biopsy specimens of nasopharyngeal mucosa obtained from non-cancer patients were studied for the presence of t-zone histiocytes ( langerhans ' cells and their precursors ) and macrophages by immunohistochemical methods with the use of antibodies against s-100 protein and lysozyme ( lys ) , respectively .
C2931822
of nasopharyngeal carcinoma
C0027442
nasopharyngeal