Rosetting and non-rosetting lymphocytes collected from normal individuals were stained for the presence of beta-glucuronidase, periodic-acid Schiff activity, gamma glutamyl transpeptidase, acid phosphatase, and alpha-naphthyl butyrate esterase. Lymphocytes which formed rosettes with sheep erythrocytes and non-rosette forming lymphocytes contained cytochemical reaction products for all five stains. Beta-glucuronidase (P less than 0-02) and acid phosphatase (P less than 0-01) were more frequently found in rosette forming lymphocytes. However, non-rosetting cells were more frequently periodic-acid Schiff positive (P less than 0-001). Gamma-glutamyl transpeptidase and alpha-naphthyl butyrate esterase were present equally in rosette and non-rosette forming lymphocytes. In addition, 33 non-Hodgkin's lymphomas were studied for cell surface markers and cytochemical reactions. In 17 of 19 B cell lymphomas, there was a paucity of lymphocytes containing beta-glucuronidase. However, in three of four T cell proliferations, there were numerous lymphoid cells positive for beta-glucuronidase. The periodic-acid Schiff and acid phosphatase reactions varied greatly within B, T, and null cell lymphomas and thus were of little diagnostic value in determining the cell of origin of these neoplastic lymphoid cells.
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