This article discusses the histological aspects of architectural changes in tissues resulting from oncological processes. Pathological changes such as inflammation, cell proliferation, atypia, necrosis, and stromal reactions are analyzed on the basis of histological sections. Particular attention is paid to the structure of benign and malignant tumors, their cellular composition, differential diagnostic capabilities, and specific microscopic features. The study identified the structural features of tumor tissues using histochemical and immunohistochemical methods. This article serves as an important theoretical basis for pathologists-histologists, oncologists, and medical professionals in clinical diagnostic practice.

oncological processes, histological appearance, tissue architecture, cellular atypia, tumor tissues, differential diagnosis, histochemistry, immunohistochemistry.

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