结果：上颌骨良性肿瘤和肿瘤样病变多为类圆形边界清楚的骨质溶解，有硬化边，呈膨胀性生长，无邻近软组织肿块。

Results: Most of the benign tumor and tumor-like diseases in maxillary bone revealed round like, well defined bony destruction with sclerotic rim, expansive growth and no surrounding soft tissue mass.

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其它的CT表现包括骨侵蚀和破坏，增强的软组织肿块、与正常组织清晰的过度带、MR对于确定肿瘤受累区域是非常有帮助的。

Other CT findings include bone erosion and destruction, an enhancing soft-tissue mass, and a sharp zone of transition to normal tissue. MR imaging is optimal for depicting areas of tumor involvement.

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结论溶骨性骨破坏和巨大软组织肿块是骨原始神经外胚叶肿瘤的常见影像学表现，病灶内钙化和局部淋巴结肿大少见。

Conclusion The osteolytic lesion and a large soft tissue mass are common radiological appearances of bone PNETs and calcification and regional lymphadenopathy are rarely seen.

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