Regueiro C A
Servicio de Oncología Radioterápica. Hospital Universitario Clínica Puerta de Hierro, Madrid, Spain.
Neurocirugia (Astur). 2003 Apr;14(2):127-39.
The management of patients with central nervous system germ-cell tumours is evolving, and a definitive standard has not been achieved. A large amount of data indicate that radiotherapy alone results in long-term relapse free survival rates of about 90% in patients with germinoma. Various prospective trials evaluated the results of combinations of chemotherapy and reduced dose and/or volume radiotherapy. The survival rates of combined treatment approaches were similar to the rates achieved with craniospinal radiotherapy alone. Nevertheless, the relapse rates were probably higher due to the significant number of relapses that arouse outside the volume treated with radiotherapy. Additional studies are necessary to determine the appropriate radiotherapy volumes and the role of combined treatments. Chemotherapy alone results in high relapse rates and can not be recommended. Mature teratomas are benign germ cell tumours that can be controlled with complete surgical resection in over 90% of cases. Non-germinoma germ cell tumours are a heterogeneous group of tumours that includes very aggressive tumours such as mixed and pure choriocarcinomas, yolk sac tumours, and embryonal carcinomas; and tumours with intermediate aggressiveness such as mixed tumours with germinoma and teratoma, immature teratomas and teratomas with malignant transformation. Both radiotherapy alone and chemotherapy alone result in quite low rates of tumour control and current treatment approaches include chemotherapy and radiotherapy, with surgical removal of the tumour in some patients. Pineocytomas are benign tumours that are controlled in most cases by complete surgical resection or partial surgical resection and local field irradiation. Current treatment approaches for pineoblastomas include surgery, chemotherapy, and craniospinal irradiation with a local boost. Chemotherapy alone was used to delay irradiation in infants with very little success.
中枢神经系统生殖细胞肿瘤患者的管理正在不断发展,尚未达成明确的标准。大量数据表明,单纯放疗可使生殖细胞瘤患者的长期无复发生存率达到约90%。各种前瞻性试验评估了化疗与降低剂量和/或缩小放疗体积相结合的效果。联合治疗方法的生存率与单纯全脑全脊髓放疗的生存率相似。然而,由于放疗体积外出现大量复发,复发率可能更高。需要进一步研究以确定合适的放疗体积以及联合治疗的作用。单纯化疗导致的复发率很高,不推荐使用。成熟畸胎瘤是良性生殖细胞肿瘤,超过90%的病例可通过完整手术切除得到控制。非生殖细胞瘤性生殖细胞肿瘤是一组异质性肿瘤,包括侵袭性很强的肿瘤,如混合性和纯绒毛膜癌、卵黄囊瘤和胚胎癌;以及侵袭性中等的肿瘤,如伴有生殖细胞瘤和畸胎瘤的混合性肿瘤、未成熟畸胎瘤和发生恶性转化的畸胎瘤。单纯放疗和单纯化疗导致的肿瘤控制率都相当低,目前的治疗方法包括化疗和放疗,部分患者还需手术切除肿瘤。松果体细胞瘤是良性肿瘤,大多数情况下通过完整手术切除或部分手术切除及局部野照射即可得到控制。目前松果体母细胞瘤的治疗方法包括手术、化疗和全脑全脊髓照射并局部加量。单纯化疗曾用于延迟婴儿放疗,但效果甚微。