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1例肺部腺癌转移至蛛网膜下腔继而浸润脑膜成脑膜癌。病理改变的特点是1.癌细胞在脑膜及蛛网膜下腔呈弥漫性浸润,硬脑膜内面颅神经周围及其内均有癌细胞浸润。2.脑实质内见有小而散在的癌细胞浸润且与周围脑组织界限不清,癌细胞从蛛网膜下腔沿血管周围间隙向脑皮质浸润,致使邻近脑组织水肿,神经细胞缺血性改变。3.右侧脑室轻度扩大,脑室系统室管膜及脉络丛组织亦有癌细胞浸润。4.癌细胞排列以腺样结构为主。
One case of lung adenocarcinoma metastasized to the subarachnoid and then infiltrated the meninges into meninges. Pathological changes are characterized by 1. The cancer cells in the meninges and subarachnoid space was diffuse infiltration, dura medial cranial nerve around and there are cancer cell infiltration. 2. In the parenchyma, small and scattered cancer cells infiltrated with unclear boundaries with the surrounding brain tissue. The cancer cells infiltrated into the cerebral cortex from the subarachnoid space around the perivascular space, resulting in the edema of adjacent brain tissues and the ischemic neuronal cells change. 3. Right ventricle slightly expanded, ventricular system ependymal and choroid plexus tissue also has cancer cell infiltration. 4. The arrangement of cancer cells is mainly adenoid.