颅内软骨性肿瘤可根据其生长部位分类如下:(1)由颅底部发生;(2)由副鼻窦发生并扩张至颅腔;(3)由脉络丛发生;(4)由脑室壁发生。此外,尚有附着于硬膜的颅内软骨瘤。本文报告1例罕见的额矢状窦旁区大脑内软骨瘤病例。肿瘤与硬脑膜、大脑镰或脑室无附着关系。与此相似的病例仅见1例报告。病例报告:女性,36岁,右利。因左腿力弱22个月并加重,于1973年1月入院。神经系 Intracranial cartilage tumors can be classified according to their growth sites as follows: (1) Occurred at the base of the skull; (2) Occurred by the paranasal sinus and dilated into the cranial cavity; (3) Occurred by the choroid plexus; (4) Occurred by the ventricular wall. In addition, there are still attached to the dura mater chondroma. This article reports a rare case of intra-cerebellar chondroma in the frontal sinus. Tumor and dura mater falx or ventricular non-attachment relationship. A similar case is seen in only one case. Case report: female, 36 years old, right-wing. Due to weak left leg for 22 months and aggravated, in January 1973 admitted. Nervous system