原发于蝶鞍区精原细胞瘤少见,其发病率约占颅内肿瘤的0.3～2.8%。现报告病例如下: 患者男性,14岁,学生,从1980年5月起突发性多戗多尿,尿量一般约~(4000ml)/24小时,有时感全身乏力、头痛、烦躁。于1983～1985年先后多次作头颅CT检查,均未发现异常。既往有右侧隐睾史,4岁时作过隐睾固定手术,1987年5月因头痛加重,又继发左侧动眼神经麻痹,伴左眼眶及左鼻旁疼痛,经X线动脉造影,左颈内动脉虹吸段、大 Primary seminoma in the sella region rare, the incidence of about 0.3 to 2.8% of intracranial tumors. The reported cases are as follows: Male patient, 14 years old, student, from May 1980 onwards, sudden onset of polyuria, urine output is about ~ (4000ml) / 24 hours, sometimes feeling malaise, headache, irritability. In 1983 ~ 1985 has made many head CT examination, no abnormalities were found. Past history of cryptorchidism on the right, 4 years old had cryptorchidism fixed surgery, May 1987 due to headache, and secondary to left oculomotor nerve paralysis, with left orbital and left nasal pain, by X-ray angiography Left internal carotid siphon segment, large