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English Abstract
Journal Article
Review
[Results of fertility preserving operations in malignant ovarian tumors].
Indication for fertility preserving surgery results from the patient's age, the histologic tumor type and the stage of the ovarian malignancy. Approximately 80-85 % of these lesions are ovarian cancers. 10-15 % tumors with low malignant potential (LMP) and approx. 5 % germ cell tumors. Of the ovarian cancers approx. 15 % of LMP tumors 50 %, and of germ cell tumors more than 90 % occur in patients below 40 years of age, in which fertility preserving surgery might be considered. An adequate operative staging permits a conservative procedure for ovarian cancers stage Ia. Due to the good prognosis of LMP-tumors (10 year survival, all stages, approx. 90 %) and the low rate of recurrences after conservative surgery of 6.8 % (10/147), a fertility preserving operation is feasible in select cases also in more advanced stages than Ia. In cases of germ cell tumors, which in the majority of cases are unilateral, even if the tumor extends beyond the ovaries, an adnexectomy will suffice. A successful chemotherapy, e.g. with bleomycin, etoposid, and cisplatin leads to remission rates of > 90 %. The reduced number of patients treated according to the above criteria in 90 % had a normal menstrual cycle after surgery and chemotherapy. Besides numerous case reports on successful pregnancies, there are also reports in literature on results in larger patients groups. Thus it has been reported that of 99 patients with an ovarian cancer stage I. 56 underwent conservative surgery. Child-bearing desire, present in 17 of these women, could be fulfilled in all cases (Colombo et al. 1995). Bianci and coworkers also described successful pregnancies (14/48) after conservative treatment of tumors of LMP. Numerous case reports have been published showing that after fertility preserving surgery of germ cell tumors pregnancies may also be successful. Since especially in ovarian cancers recurrences may occur at a later time, a hysterectomy with removal of the contralateral adnexa is suggested after complete family planning or when the patient enters the menopause. The possibilities offered by in vitro-fertilization have theoretically enlarged the spectrum of fertility preserving surgery. Thus, individual authors propose the conservation of the uterus after bilateral ovarectomy-keeping the option of a pregnancy by oocyte donation open for the patient. As further alternative conservation of a restovary after removal of the uterus and one adnexa is discussed. In these cases the patient's oocytes are preserved for feasible in vitro-fertilization in a "substitute" mother. Results of such fertility preserving procedures have not yet been published.
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