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目的：探讨上颌骨肿瘤和肿瘤样病变的ＣＴ诊断要点。方法：回顾性分析４１例经病理证实的前述病变患者的ＣＴ资料。全组均行上颌骨轴、冠状位以５毫米层厚和层距ＣＴ平扫和增强扫描。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。相反原发性上颌骨恶性肿瘤则呈浸润性生长，骨质不规则破坏，大量瘤骨或瘤软骨形成、骨膜反应和软组织肿块等。上颌骨良性病变恶变征为体积迅速增大、病灶内出现新的肿瘤物质、边界不规则呈侵袭性。结论：ＣＴ能准确展示上颌骨肿瘤和肿瘤样病变的形态学和强化特点，结合临床多能做出正确诊断。
Objective: To investigate the key points of CT diagnosis of maxillary tumors and tumor-like lesions. Methods: The CT data of 41 pathologically confirmed patients with the above lesions were retrospectively analyzed. All patients underwent maxillary axis, coronal to 5 mm layer thickness and layer CT scan and enhanced scan. Results: The maxillary benign tumors and tumor-like lesions were mostly osteoid lysis with round border, with sclerous edges, swollen growth and no adjacent soft tissue mass. In contrast, primary maxillary malignancies showed invasive growth, irregular bone destruction, a large number of tumor or tumor cartilage formation, periosteal reaction and soft tissue mass. Malignant lesions of benign lesions of the maxillary rapid increase in volume, the emergence of new tumor material within the lesion, the irregular border was invasive. Conclusion: CT can accurately show the morphology and enhancement characteristics of maxillary tumor and tumor-like lesions, and can make correct diagnosis with clinical diagnosis.