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Histochemical studies of the membranous glycoprotein with horse-raddish peroxidase conjugated lectins were performed on 3 cases of normal laryngeal mucosa, which were obtained operativelly from the patients with hypopharyngeal cancer, and on 13 cases of vocal cord polyps extirpated micro-laryngo-surgery.The results obtained were as follows:1) In stratified squamous epithelium of normal vocal cord, basal and keratinezed stratum differed from the middle stratum lacking in affinity for Ulex europeus agglutinin-I (UEA-I). And the staining with peanut agglutinin (PNA) showed specific binding to the spinous and lower granular layer.2) In stratified squamous epithelium of vocal cord polyps, they were classified into the following three types according to thier staining features with both lectins. a) UEA-I binded strongly to the upper spinous and granular cells. Some cells of the granular layer showed variable intensity ranging from lightly to strongly positive staining with PNA. Both of edematous and fibrous changes were observed in the stroma of these polyps. b) All cell layers except for basal layer were stained with UEA-I. The spinous layer and some cells of the granular layer were stained with PNA. In these polyps, edematous stroma was observed. c) Inter-cellular staining of the lower spinous layer showed specific feature to UEA-I. The basal and lower spinous layers were stained with PNA. Fibrin precipitation, hemorrhage and plasma infiltration were shown in the stroma of these polyps.These data may strongly suggest that expression of membranous glycoprotein in epithelium differs according to the maturation of cells from the basal cell to the more mature keratinocyte, and also indicate that lectins may be used as marker in various stages of normal and abnormal differentiation.

Histochemical studies of glycoconjugates in the upper airway mucosa. Comparative studies of glycoproteins of normal vocal cord and vocal cord polyps.