肿瘤边缘呈分叶状，2例患者显示中鼻甲或上颌窦内侧壁骨质吸收。
The surface configuration of the tumors was lobulated, and 2 cases showed bony absorption of the middle turbinate or the maxillary sinus.
原发性肿瘤多表现为椭圆形或分叶状不均匀低回声肿块。
Oval or lobulated heterogeneous hypoechoes were the diagnostic features of primary omental tumors.
组织病理学检查示肿瘤呈分叶状增生，与表皮相连，主要由向外毛根鞘分化的鳞状上皮组成，周边基底细胞排列成栅栏状。
They were mainly consisted of epithelia differentiated towards cells of the outer root sheath, and the peripheral basal cells of the tumor lobules showed palisading arrangement.
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