Abstract
The cytoplasmic mucin in the Paget cells of extramammary Paget's disease was examined with a battery of histochemical techniques. The staining methods used were alcian blue, azure A and periodic acid-Schiff. In a further attempt to identify various polyanions, staining was carried out with alcian blue containing various concentrations of electrolyte. Methylation, saponification, borohydride reduction, acid hydrolysis, and digestion with diastase, sialidase, chondroitinase ABC, or nucleases were also employed. The results obtained suggest that the cytoplasmic mucin in the Paget cells is sialomucin without side-chain substituent.
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