There are tightly packed cells growing around ramifying ,thin-walled,endothelium-lined vascular channels ranging from larger sinusoidal spaces to small capillaries microscopically.

• 病理学检查可见紧密排列的肿瘤细胞围绕丰富的不同口径的薄壁血管腔,同时缺乏特异性的免疫标识。广泛切除是治疗血管外皮瘤的有效方法。