患儿男，９岁。枕部头皮肿瘤１ａ余，渐长大，约核桃大小，当地医院手术，术中发现血运丰富，未能切除。颅片示：未见骨质破坏。术中见：肿物内含豆渣样物，部分与皮肤粘连，有韧性，无毛发，颅骨可见压迹形成，板障有多数血管供应，肿物无包膜。病理检查：带皮软组织一块... The boy is 9 years old. More than 1a of occipital scalp tumors grew up, about the size of walnuts, local hospital surgery, blood flow was found during surgery, failed to remove. Skull showed: no bone destruction. During the operation, the tumor contained bean dregs-like substances, some of which adhered to the skin, had ductility, no hair, and the formation of impression marks on the skull. Most of the vessel defects were supplied with blood vessels, and the tumor was non-enveloped. Pathological examination: a piece of soft tissue with skin...