[Ovarian cancer in a monocygotic twin pair (Author's transl)]

We report on a female monocygotic twin pair, where the two women fell ill of an adenocarcinoma of the ovaries almost simultaneously. The paramesonephric epithelium of the coelom is discussed as origin for the disease. The concordance of the disease in the same environment points to the genetic factors is being more important in the development of the disease. Nevertheless a clearcut hereditary troit can not be defined at this time.