第三脑室内占位性病变的正确诊断需要临床和放射学两方面的检查。实验室检查对某些病例可以提供重要的辅助资料。然而,定性诊断除少数病例外必须依靠病理学检查确定。临床症状和体征可以提示第三脑室肿瘤的存在,但不能提供确诊依据。疑有第三脑室占位性病变时,放射学检查是必要的,目的是为恰当治疗和估计预后取得资料。放射学检 The correct diagnosis of space occupying lesions in the third ventricle requires both clinical and radiological examination. Laboratory tests can provide important supporting information for some cases. However, qualitative diagnosis must rely on pathological examination in addition to a few cases. Clinical symptoms and signs may suggest the presence of third ventricle tumors, but it does not provide a definitive basis for diagnosis. Radiographic examination is necessary when there is suspected space occupying lesion of the third ventricle in order to obtain data for proper treatment and estimation of prognosis. Radiology examination