Abstract
Lectin-binding sites in sections of formalin-fixed, paraffin-embedded eccrine sweat gland tumours were investigated using fluorescein isothiocyanate (FITC) conjugated peanut agglutinin (PNA), FITC conjugated Ricinus communis 1 agglutinin (RCA-1) and FITC conjugated wheat germ agglutinin (WGA). In 22 benign eccrine sweat gland tumours, lectin-binding sites were noted primarily on the cell surface, and in the secretions. In five malignant sweat gland tumours, all showed cytoplasmic lectin-binding sites in variable proportions of malignant cells in addition to cell surface staining. These results indicate that cytoplasmic lectin-binding sites may be a useful marker of neoplastic transformation of eccrine sweat gland tumours.
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