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Gerbaulet, A P; Esche, B A; Haie, C M; Castaigne, D; Flamant, F; Chassagne, D
International journal of radiation oncology, biology, physics, 09/1989, Volume: 17, Issue: 3Journal Article
Between 1972 and 1986, 37 patients with lower genital tract malignancies were treated with intracavitary or interstitial brachytherapy. Thirteen patients presented with clear cell adenocarcinoma, 14 patients with embryonal rhabdomyosarcoma, 6 patients with endodermal sinus tumor, 3 patients with sarcoma, and 1 patient with an undifferentiated tumor. FIGO classification was: Stage I, 16%; Stage II, 47%; and Stage III, 37%. Treatment policy included initial exploratory laparotomy with lymph node biopsy and ovarian transposition, chemotherapy (except in clear cell adenocarcinoma) and/or external radiotherapy prior to interstitial brachytherapy. Chemotherapy consisted of a combination of VAC-Ad (V = vincristine, A = D actinomycin, C = cyclophosphamide, Ad = adriamycin) in rhabdomyosarcoma and sarcomas, and MAC-Ad (M = methotrexate) in endodermal sinus tumor. External radiotherapy was used in seven patients: in one to reduce a bulky clear cell adenocarcinoma (20 Gy) and in six for pelvic nodal involvement (45 Gy). Brachytherapy techniques depended on tumor site and extent, and on the anatomy of the patients. Vulvar tumors were implanted with iridium-192 wires by an afterloading plastic tube technique. Cervical and vaginal tumors were treated with individually tailored moulded vaginal applicators loaded with either cesium-137 or iridium-192, with or without interstitial implants by plastic tube or guide gutter technique. Computerized dosimetry allowed calculation of treatment volumes and doses delivered on the tumor and adjacent critical organs. The prescribed dose (including external radiotherapy) was 60-75 Gy with 1-3 brachytherapy applications of a low dose rate (0.2 Gy/hr). Six patients are dead: one from chemotherapy complication, three of metastases (two sarcomas, one endodermal sinus tumor) and two of pelvic failures and metastases (two clear cell adenocarcinoma). The overall disease free 5-year survival is 72%. Actuarial 5-year local control is 84%, but including salvage is 94%: three (two rhabdomyosarcoma, one clear cell adenocarcinoma) of the five local failures were salvaged by surgery, chemotherapy and/or brachytherapy. Metastases occurred in six patients, one (sarcoma) salvaged by chemotherapy and external radiotherapy. Complications requiring surgery occurred in five patients: two hydronephroses, one urethral stricture, one ileo-cecal obstruction, and one vesicovaginal fistula. Twelve of the 17 patients (71%) over 12 years of age are normally menstruating. Two patients have produced three normal children. This multidisciplinary management of lower gynecological tract tumors including brachytherapy is both conservative and effective.
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