The target appearance was seen in only 2 schwannomas and 1 NPNST,in which the central zone of them composed of tightly packed fibers accompanied by areas of calcification in the latter,the peripheral zone of the tumors composed of loosen mucus.

• 肿瘤信号多欠均匀 ,T2 wi呈“靶征”者 3例 ,2例神经鞘瘤靶心有较多纤维组织 ,靶周明显水肿、粘液变性 ,1例MPNST靶心有较多纤维组织和部分钙化。