[Dignity of morgagni hydatids (scanning-electronoptical and light-optical investigations (author's transl)]

Scanning-electronoptical and light-optical investigations were performed on 25 Morgagni-hydatids being a special type of parovarial cysts and not descending from the Fallopian tube. An epithelium similar to that of the Fallopian tube was found not depending to cyclic changes. In one case atypical papillary growth with disorder in cellular differentiation causing in an increased proliferation could be demonstrated. As hydatids belong to parovarial cysts, they may become malignant and therefore should be exstirpated in any case.