口腔颌面部恶性黑色素瘤的CT表现

CT findings of malignant melanoma in oral and maxillofacial region

目的：评价口腔颌面部恶性黑色素瘤的CT表现。方法：回顾性分析了经CT检查的口腔颌面颈恶性黑色素瘤病例15例(23灶)。CT检查包括平扫(15例,23灶)和增强(12例,19灶)。所有病例均经病理检查证实。结果：22/23灶恶性黑色素瘤在CT检查中呈阳性表现．包括原发病变14灶和颈部淋巴结转移性病变8灶。病变呈软组织肿块者20灶,黏膜增厚者2灶(均为原发灶)。病变边缘不清者18灶,边缘清晰者4灶。增强CT显示：不均匀强化者9灶,均匀强化者5灶,无强化者5灶。病变压迫颈静脉变形3灶,侵犯上颌骨7灶,侵犯下颌骨2灶。结论：口腔颌面部恶性黑色素瘤的CT表现具有多样性。病变多以边界不清并有增强的软组织肿块为特点。

PURPOSE： The aim of this study was to assess the CT features of malignant melanoma originated from the oral and maxillofacial and neck region. METHODS： Fifteen subjects with 23 melanomas in the oral and maxillofacial and neck regions were retrospectively studied with plain （15 subjects） and enhanced （12 subjects） CT examinations. All the malignant lesions were confirmed histopathologically. RESULTS： Twenty-two lesions, fourteen primary and eight metastatic, out of 23 melanomas had positive appearances on CT images. Twenty lesions were demonstrated as soft tissue masses, and 2 as thickening of mucosa （primary lesion）. Eighteen lesions were with ill-defined margins and 4 with welldefined margins. Of 19 lesions with contrast CT examination, 5 were evenly enhanced, 9 unevenly enhanced, and 5 without enhancement. The sign of compression of the internal jugular vein was found in 3 lesions. Invasion of the maxilla and mandible was visible in 7 and 2 melanomas, respectively. CONCLUSIONS： The CT manifestations of melanomas in the oral and maxillofacial regions are multiple, and most of them were characteristic of inhomogeneous soft tissue masses with ill-defined margins.