Abstract
In this paper, 60 cases with pseudo-malignant changes of the endometrial epithelium are studied from the clinical and microscopic standpoints. All patients were treated with radium in doses commonly used for uterine cancer, and followed up for at least 5 yrs. 10% of the patients later developed adenocarcinoma. Through the histological investigation, evidence is given of the importance of drawing a borderline as definite as possible between benign and malignant lesions, in order to justify the inclusion or the exclusion of the "debatable" cases in the statistics of cancer of the uterine body.