At a woman, at that time only 27 years old, because of a one-sided ovarian tumour, the abdominal hysterectomy with the resection of both appendages had been carried out. At the same time the other ovary macroscopically without pathological findings had been implanted into the Retzius cavity, where later it degenerated tumourously like the histological picture of a cystoma serosum papilliferum proliferans. Since the resection of the second tumour, which was carried out 28 years after the first operation, there has been found no more manifestation of a tumour up to now.
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