text: 主要有以下三大类：①肿瘤阻塞第三脑室出口引起梗阻性脑积水及颅高压；②邻近结构受压症，如压迫中脑四叠体上丘导致双眼不能上视内分泌紊乱：松果体区肿瘤可分泌褪黑激素，影响垂体分泌促性腺激素，可表现为发育迟缓，性功能减退、肥胖、嗜睡等。
entities.entity: 肿瘤
entities.label: dis
entities.entity: 第三脑室
entities.label: bod
entities.entity: 梗阻性脑积水
entities.label: dis
entities.entity: 颅高压
entities.label: dis
entities.entity: 中脑四叠体上丘
entities.label: bod
entities.entity: 双眼
entities.label: bod
entities.entity: 压迫中脑四叠体上丘导致双眼不能上视
entities.label: sym
entities.entity: 内分泌紊乱
entities.label: sym
entities.entity: 松果体区肿瘤
entities.label: dis
entities.entity: 褪黑激素
entities.label: bod
entities.entity: 垂体
entities.label: bod
entities.entity: 促性腺激素
entities.label: bod
entities.entity: 发育迟缓
entities.label: sym
entities.entity: 性功能减退、肥胖、嗜睡等
entities.label: sym