[Relations between atypical hyperplasia, dysplasia and prostatic cancer and the significance of its appearance for the clinician].

In 89 preparations of patients with a carcinoma of the prostate and 100 preparations of patients with a hyperplasia of the prostate (adenoma of the neck of the bladder) the appearance of primarily atypical hyperplasias was investigated. In these cases in the carcinoma group in the uniform as well as in the pluriform carcinomas a coincidence of carcinoma and atypical hyperplasia of 55% was found. The coincidence is particularly high in adenocarcinomas and in carcinomas with dominating adenoid part, respectively, i. e. in more mature glandular structures. Among the various histological types of the atypical hyperplasia the microglandular/papillary clear-cellular form is dominating with 82%. In the group of the benign hyperplasia of the prostate gland a coincidence of the atypical hyperplasia of 33% was found. Though this rate, in comparison to other investigators, seems to be relatively high, it is still significantly lower than in the carcinoma. From this follows that the atypical hyperplasia, particularly its severest forms and dysplastic deformations from other hyperplasias (postatrophic hyperplasia, basal cell hyperplasia, atrophy and metaplasia of the prostate) now as ever are suspected that these cases in question are precancerous lesions. For the clinically working urologist the task is derived in such histopathological diagnoses by clinical and bioptical follow-up controls to find an already existing, but still unrecognized, or developing carcinoma of the prostate gland. In no case the diagnosis may cause surplus therapeutic consequences.