Modification of the lysosomalkationic test by V. E. Pigarevsky (1978) is suggested. The method implies usage of 10% neutral formalin (according to Lilly) for the material fixation, optimal staining of histological preparations from gastric and duodenal mucosa with fast green, usage of hematoxyline Carazzi for the additional staining of cellular nuclei. The technique is readily available, it is easily interpreted, is highly informative for studying the inflammatory changes in gastric and duodenal mucosa in gastroduodenal diseases and in the experiments.
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