text: 肿瘤直径多在几厘米范围，切面灰白或灰红色，形态不规则，质软，肿瘤内可见大小不一的腔隙显微镜下可见广泛增生的内皮细胞其结构呈形状不规则的血管腔相互吻合成网。
entities.entity: 肿瘤
entities.label: dis
entities.entity: 肿瘤直径多在几厘米范围
entities.label: sym
entities.entity: 切面灰白或灰红色
entities.label: sym
entities.entity: 形态不规则
entities.label: sym
entities.entity: 质软
entities.label: sym
entities.entity: 肿瘤
entities.label: dis
entities.entity: 腔隙
entities.label: bod
entities.entity: 肿瘤内可见大小不一的腔隙
entities.label: sym
entities.entity: 显微镜
entities.label: equ
entities.entity: 内皮细胞
entities.label: bod
entities.entity: 显微镜下可见广泛增生的内皮细胞
entities.label: sym
entities.entity: 血管腔
entities.label: bod
entities.entity: 其结构呈形状不规则的血管腔
entities.label: sym
entities.entity: 相互吻合成网
entities.label: sym