Prognostic predictors and spread patterns in adult ovarian granulosa cell tumors: a multicenter long-term follow-up study of 108 patients.

PURPOSE: To identify prognostic predictors and spread patterns in adult ovarian granulosa cell tumors (OGCTs). METHODS: Available retrospective data of 108 OGCT patients managed at three centers between January 1, 1991 and December 31, 2010 were abstracted and analyzed. RESULTS: Stage distributions at diagnosis for stage I, II and III OGCT were 84.3, 5.4, and 9.3 %, respectively. Optimal cytoreduction with no macroscopically visible disease was achieved in 99/108 (91.6 %) patients. The median disease-free interval to first recurrence was 61 months. The overall 5- and 10-year survival rates were 93.3 and 90.9 %, respectively. Disease recurred in 18 (16.6 %) patients, and 8 (7.4 %) patients died of their disease. The first recurrence sites included the pelvic peritoneum (n = 10), liver/liver-capsule (n = 5), rectosigmoid colon (n = 4), retroperitoneal lymph nodes (n = 3), omentum (n = 3), small bowel mesenterium (n = 2), and vaginal cuff (n = 2). Multiple-site recurrence was observed in 9/18 (50 %) patients. Secondary cytoreduction requiring extensive surgery was performed in 14 patients with an optimality rate of 71.4 %. The remaining four patients received only chemotherapy. Multivisceral approaches, including pelvic peritonectomy (n = 9; 64.2 %), rectosigmoid resection (n = 3; 21.4 %), and segmental liver capsule resection (n = 2; 14.2 %) were performed more frequently during the secondary surgery. Definitive retroperitoneal lymph node metastasis rates at the initial and recurrent settings were 5.1 % (3/58) and 21.4 % (3/14), respectively. Both stage and residual tumor status were significantly associated with recurrence in univariate and multivariate analyses. CONCLUSIONS: Stage and residual tumor status are predictors of recurrence. Pelvic peritoneal, nodal and hepatic involvement, and multiple-site spread patterns requiring extensive cytoreductive surgery are likely associated with recurrence of OGCTs.