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- ArticleGierek T, Lisiewicz J, Pilch J, Sasiadek UY, Namyslowski G.Folia Haematol Int Mag Klin Morphol Blutforsch. 1978;105(5):640-5.In 24 men with precancerous states of the larynx, i.e. leukoplakia, papillomas and pachydermia, the peripheral blood lymphocytes were cytochemically stained for N-acetyl-beta-glucosaminidase, beta-glucuronidase, acid phosphatase and glycogen (PAS reaction). The results were expressed in terms of the absolute counts of enzyme- (or compound-) positive cells. The serum immunoglobulin IgG, IgA and IgM levels were also determined by Mancini's method. The results obtained were compared with those in 20 healthy men aged 20 to 30 years. It was found that the patients exhibited elevated numbers of N-acetyl-beta-glucosaminidase- and beta-glucuronidase-positive lymphocytes. A characteristic feature was an increase in the absolute counts of lymphocytes with diffuse and granular-diffuse types of cytochemical reaction for all enzymes studied. The number of cells with the granular type of enzymatic reaction (intact enzyme-positive lysosomes) was significantly diminished. These cytochemical alterations were accompanied by a significant increase in the serum IgA level. These results are discussed with reference to the lymphoid system response to tissues with precancerous lesions of the larynx.