Lobulation, long and stiff spiculation and sawtooth interface were imaging characteristic in their margin.
病灶边缘以分叶征、星芒状毛刺、界面锯齿征为主要特征；
2
CT value was less than 50HU. Edge:the edge was more clear and irregular lobulation in 14 cases(67%) and round or class round in 7 cases(33%) with unclear boundaries.