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目的目的探讨腮腺腺泡细胞癌(ACC)的影像学特点及其与多形性腺瘤(PA)的CT及MRI鉴别诊断价值。方法回顾性分析17例腮腺ACC的CT及MRI表现,对比分析其与61例PA的CT及MRI表现的差异,并行统计学检验。结果与PA相比,ACC在年龄、包膜、微囊改变、周围侵犯、ADC值(841.2±113.6/1285.1±244.6,P=0.000)及TIC曲线类型(A型:0/29;B型:1/0,P=0.000)方面差异均具有统计学意义(P<0.05),而在位置、最大径、边界、形态、肿瘤密度/信号、强化、出血、钙化、囊变及淋巴结肿大方面差异无统计学意义(P>0.05)。C型TIC曲线及ADC值在二者鉴别的敏感性分别达75.0%、90.5%,特异性分别达96.7%、100.0%。结论 CT及MRI不仅有助于ACC与PA的鉴别诊断,而且在其术前分期及判断预后中同样具有较大价值。
Objective To investigate the imaging characteristics of parotid acinar cell carcinoma (ACC) and its value of differential diagnosis between CT and MRI in pleomorphic adenoma (PA). Methods The CT and MRI findings of 17 cases of parotid gland ACC were analyzed retrospectively. The CT and MRI findings of 61 cases of PA were compared and analyzed statistically. Results Compared with PA, the changes of ACC, age, capsule, microcapsules and surrounding infiltration, ADC value (841.2 ± 113.6 / 1285.1 ± 244.6, P = 0.000) and TIC curve type (A type: 0/29; 1/0, P = 0.000), but there was no significant difference in location, maximum diameter, boundary, morphology, tumor density / signal, enhancement, bleeding, calcification, cystic change and lymph node enlargement The difference was not statistically significant (P> 0.05). The sensitivity of C-type TIC curve and ADC value were 75.0% and 90.5% respectively, and the specificity was 96.7% and 100.0% respectively. Conclusion CT and MRI not only contribute to the differential diagnosis of ACC and PA, but also have great value in its preoperative staging and prognosis.