松果体区胚生殖细胞瘤部位深在,手术切除风险较高,但对放射治疗敏感[1-2]。因此,临床上常对此类患者采用影像(CT/MRI)引导下的立体定向放射治疗,取得较好疗效[2-3]。颅内血肿的吸收是一个复杂的过程,单纯颅内血肿的吸收通常要经过数周时间,肿瘤内的出血吸收比良性血肿的吸收时 Pineal region germ cell tumor deep in the site, the risk of surgical resection higher, but sensitive to radiation therapy [1-2]. Therefore, it is often clinically used for such patients under the guidance of stereotactic radiotherapy under CT / MRI guidance to achieve better therapeutic effects [2-3]. Intracranial hematoma absorption is a complex process, the absorption of simple intracranial hematoma usually takes a few weeks, the bleeding within the tumor than the absorption of benign hematoma