Objective: Testicular mixed germ cell tumor is mixed with embryonal carcinoma, choriocarcinoma, yolk sac tumor, teratoma, seminoma and other two or more components of the testicular tumor, the clinical is relatively rare and high degree of malignancy, this article will summarize its clinical features and optimize its treatment.Methods: A retrospective analysis of the clinical data of 22 patients with testicular tumor mixed germ cell in Peking University Third Hospital from May 1994 to November 2016 was conducted using a combination of statistical analysis and discussion of the relevant literature.Results: The mean age of the 22 patients was (30.8±10.4) years and the rate of cryptorchidism was 13.6%.The maximum diameter of the tumor was (5.1±2.7) cm.The pathological results suggested that 12 cases (54.5%) contained two different germ cell tumor components, 7 cases (31.8%) contained 3 different tumor components, 2 cases (9.2%) contained 4 different tumor components, and 1 case (4.5%) contained 5 different tumor components.Tumor constituent analysis included yolk sac tumors(16 cases, 72.7%), mature teratoma (7 cases, 31.8%), immature teratoma (5 cases, 22.7%), embryonal carcinoma (17 cases, 77.3%) , choriocarcinoma (4 cases, 18.1%) and seminoma (6 cases, 27.3%).American Joint Committee of Cancer tumor staging indicated 19 cases of stage Ⅰ a tumor, 2 cases of stage Ⅱa tumor and 1 case of stage Ⅲa tumor.The mean values of human chorionic gonadotropin, alpha-fetoprotein and lactate dehydrogenase were 414.50 MIU/mL, 242.95 μg/L, 196.95 U/L (preoperative) and 17.20 MIU /mL, 90.20 μg/L, 183.70 U/L (postoperative within a year), and the comparison of the P values between the preoperative and the postoperative within a year were 0.079, 0.043 and 0.624.Fourteen patients underwent retroperitoneal lymph nodes dissection.Most patients lived with long-term survival (94.4%) after operation.Conclusion: Comprehensive treatment of radical orchiectomy with retroperitoneal lymphadenectomy combined with necessary radiotherapy or chemotherapy might help to control the tumor and achieve long-term survival for most patients with testicular mixed germ cell tumor.%目的:睾丸混合性生殖细胞瘤是混有胚胎性癌、绒毛膜癌、卵黄囊瘤、畸胎瘤、精原细胞瘤等两种或以上成分的睾丸肿瘤,临床较为少见且恶性度较高,本文将总结其临床特征并优化其治疗方式.方法:回顾性分析北京大学第三医院自1994年5月至2016年11月收治22例睾丸混合性生殖细胞瘤患者的临床资料,使用统计分析并结合相关文献进行讨论.结果:22例患者平均年龄为(30.8±10.4)岁,隐睾率为13.6%.肿瘤最大径平均为(5.1±2.7)cm.病理结果提示12例(54.5%)包含2种不同生殖细胞肿瘤成分,7例(31.8%)包含3种不同肿瘤成分,2例(9.2%)包含4种不同肿瘤成分,1例(4.5%)包含5种不同肿瘤成分.肿瘤成分分析包括卵黄囊瘤(16例,72.7%)、成熟畸胎瘤(7例,31.8%)、未成熟畸胎瘤(5例,22.7%)、胚胎性癌(17例,77.3%)、绒毛膜癌(4例,18.1%)、精原细胞瘤(6例,27.3%).根据美国癌症学会肿瘤分期,19例为Ⅰa期肿瘤,2例为Ⅱa期肿瘤,1例为Ⅲa期肿瘤.术前与术后1年内血清肿瘤标志物人绒毛膜促性腺激素、甲胎蛋白和乳酸脱氢酶的平均值分别为414.50 MIU/mL、 242.95 μg/L、196.95 U/L(术前)和17.20 MIU/mL、90.20 μg/L、183.70 U/L(术后),术前与术后1年内组间比较所得P值分别为0.079、0.043和0.624.14例患者术后行腹膜后淋巴结清扫术.术后大部分患者长期生存(94.4%).结论:睾丸根治性切除术后联合腹膜后淋巴结清扫以及必要的放化疗等综合治疗可能有助于控制肿瘤,并使大部分患者获得长期生存.
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