[Immunohistochemical and ultrastructural characteristics of papillary carcinoma of the thyroid in people living in regions contaminated with radionuclides].

Papillary thyroid carcinoma was studied in 12 patients who lived in the radionuclide polluted and nonpolluted areas. Neither immunohistochemical nor EM differences in the structure of the carcinoma between the contaminated and non-contaminated regions were found. Three structural variants were identified: classical, follicular and mixed, immunohistochemically having follicular-cell differentiation. Three EM types of cell were observed: dark, clear and intermediate.