[Clinical characteristics and prognosis of ovarian juvenile granulosa cell tumors].

Objective: To analyze the clinical characteristics, treatments, and prognosis of patients with ovarian juvenile granulosa cell tumor (JGCT). Methods: Clinical and pathological data, and follow-up information of 34 patients diagnosed with JGCT from 2000 to 2021 were collected from the surveillance, epidemiology, and end results (SEER) database. A retrospective analysis was conducted to summarize the patients' clinical and pathological characteristics, treatments, and prognosis. Propensity score matching (PSM) was used to match the JGCT cases with adult granulosa cell tumor (AGCT) cases in SEER database. A total of 96 patients with ovarian granulosa cell tumor (OGCT), including 32 cases of JGCT and 64 cases of AGCT, were enrolled in a matched cohort analysis. Univariate and multivariate Cox regression analysis were performed on the matched cohort to explore the risk factors for overall survival. Kaplan-Meier curves and the log-rank test were used to compare the survival outcomes between JGCT and AGCT. Results: (1) The median age at diagnosis for the 34 JGCT patients was 19.5 years (ranged: 1-48 years), with 3 patients aged ≤10 years, 16 patients aged 11-20 years, 11 patients aged 21-30 years, and 4 patients aged >30 years. Tumors originated unilaterally in 33 patients, with only 1 case originating bilaterally. The maximum tumor diameter was recorded in 26 patients, with a median size of 12.4 cm (ranged: 3.5-40.0 cm). According to the 2014 International Federation of Gynecology and Obstetrics (FIGO) staging system, 19 patients were diagnosed with stage Ⅰ (including 10 cases with stage Ⅰa and 9 cases with stage Ⅰc), 4 patients with stage Ⅱ, 8 patients with stage Ⅲ, and 3 patients with stage Ⅳ. Two patients did not undergo surgery for the resection of lesions. Stage Ⅰ patients (15/19) underwent fertility-sparing surgery, while stage Ⅱ-Ⅲ patients underwent either fertility-sparing surgery or cytoreductive surgery (6 cases each). Stage Ⅳ patients underwent cytoreductive surgery (2 cases). Lymph node dissection was performed in 10 patients, among which only 1 patient with positive lymph nodes metastasis. None of the 34 patients received radiotherapy, while 18 patients received adjuvant chemotherapy (included neoadjuvant chemotherapy and postoperative adjuvant chemotherapy). The proportion of stage Ⅰ patients receiving adjuvant chemotherapy was relatively low, with only 4 out of 19 patients (including 2 out of 10 cases for stage Ⅰa and 2 out of 9 cases for stage Ⅰc). The proportions of patients receiving adjuvant chemotherapy for stages Ⅱ, Ⅲ and Ⅳ were 3 out of 4 cases, 8 out of 8 cases, and 3 out of 3 cases, respectively. The follow-up ended in December 2021, with 20 patients alive and 14 dead. The survival rate for ovarian JGCT patients was 59% (20/34). Among them, the survival rate for stage Ⅰ patients was 16/19, while for stage Ⅱ-Ⅳ patients, it was 4/15; there was a statistically significant difference (P=0.002). Among stage Ⅱ-Ⅲ patients, the survival rate at the end of follow-up was 1/6 for those who underwent fertility-sparing surgery, compared to 3/6 for those who underwent cytoreductive surgery (P=0.546). (2) For the 96 OGCT patients after matching using the PSM method, 64 ovarian AGCT patients had 5 deaths and 59 survivors during the follow-up period, the survival rate was 92% (59/64) at the end of follow-up. In contrast, among the 32 ovarian JGCT patients, 13 died and 19 survived, resulting in a survival rate of 59% (19/32) at the end of follow-up, which was statistically significant difference for the AGCT group (P<0.001). Univariate Cox analysis revealed that histology, extent of surgery, chemotherapy, postoperative tumor residual status, and stage all significantly affected the survival outcomes of OGCT patients (all P<0.05). Multivariate Cox analysis revealed that variables with significant statistical differences were histology and stage. The median survival time for JGCT patients was 126 months, while AGCT patients median survival time was not reached with a statistically significant between the two groups (P<0.001). Conclusions: Ovarian JGCT predominantly occur in adolescents and young women. Lymph node metastasis is relatively rare, and treatment primarily involves surgery and adjuvant chemotherapy. Most ovarian JGCT patients are diagnosed at stage Ⅰ, with a favorable prognosis. Fertility-preserving surgery is recommended, involving salpingo-oophorectomy on the affected side plus comprehensive staging surgery, or a second surgery to achieve comprehensive staging. For stage Ⅱ-Ⅳ ovarian JGCT patients, the prognosis is relatively poor, and fertility-preserving surgery should be considered with caution. The prognosis of ovarian JGCT patients is worse than that of ovarian AGCT patients.