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Computerized multifactorial analysis of 56 cytologic features was performed in 135 cases suffering glandular and atypical hyperplasia and well-differentiated endometrial carcinoma (45 patients in each group). The established regularities enabled students to differentiate between hyperplasia and cancer in 95% of cases in classes and in 73-83% at examination.

The following general principles are necessary for achieving the maximum efficiency in the postgraduate training of pathologists in the histological diagnostics of various diseases particularly that of precancer and early forms of cancer: 1) specification of the optimal working classification clinically (prognostically) significant and corresponding to the methodological possibilities of pathologists; 2) use of the most informative diagnostical criteria; 3) formation of visual images of the diagnostical criteria including the stages of transition from the stereometric representation into the plane one, the differentiation between the feature and structural formations that imitate it, elaboration of criteria for the evaluation of the degree of semiquantitative signs; 4) placing the diagnostical criteria in the optimal order; 5) finding the criteria of the correctness of the diagnosis in question. The development of the above criteria is important in teaching, in working out methodological literature and in postgraduate selfeducation.