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患者男性,50岁。反复头晕头痛3年,加重1个月。外院MRI示三脑室后部可见椭圆形不均匀生长P1T2信号,边界清,幕上脑室扩大,三脑室突入鞍上池。病理检查巨检:灰红色碎组织一堆,2 cm×1.5 cm×0.3 cm大小,质软。镜检:肿瘤主要由未分化的小细胞组成,呈实质,细胞密度较高。肿瘤细胞圆形、类圆形、短梭形或多角形,核呈圆形或类圆形,富含染色质、深染,未见明显核仁,可见核分裂象。胞质较少,细胞边界不清,细胞弥漫、密集排
Male patient, 50 years old. Repeated dizziness and headache for 3 years, increased 1 month. Outside the hospital MRI showed three ventricle posterior visible oval uneven growth P1T2 signal, the boundary is clear, supratentorial ventricles expand, three ventricle broke into the saddle pool. Histopathological examination: a pile of red and gray broken tissue, 2 cm × 1.5 cm × 0.3 cm size, soft. Microscopic examination: The tumor mainly consists of undifferentiated small cells, was substantial, higher cell density. Tumor cells were round, round, short fusiform or polygonal, round or oval nucleus, rich in chromatin, deep staining, no obvious nucleolus, mitotic figures can be seen. Less cytoplasm, unclear cell boundaries, diffuse cells, dense row