腮腺良惡性腫瘤鑒別診斷的MRI征象分析
[Abstract]:Objective: to analyze the MRI features of parotid benign and malignant tumors, to compare the MRI signs used to differentiate benign and malignant parotid tumors, and to investigate the supportive MRI signs of some parotid tumors. Materials and methods: the clinical and imaging data of 165 cases of parotid tumors confirmed by pathology from January 2008 to December 2012 were analyzed retrospectively. The results were as follows: 1. According to the histological type, the malignant group and the benign group were divided into malignant group and benign group. The difference of each evaluation index between the two groups was compared, and the analysis was helpful in differentiating the MRI signs of benign and malignant tumors. The indicators included: sex, age, location, size, shape, MRI signal, boundary, growth pattern, peripheral tissue invasion, bone destruction, lymph node infiltration. Secondly, pleomorphic adenoma, basal cell adenoma, acinar cell carcinoma, mucoepidermoid carcinoma, squamous cell carcinoma, eosinophil carcinoma and lymphoma were compared with other tumors, and their supportive MRI findings were summarized. Results: first, the MRI signs for differential diagnosis of benign and malignant parotid gland were compared. The occurrence rate of the following signs in benign group was significantly higher than that in malignant group: high signal intensity in T2WI (P0. 004), homogeneous signal intensity in T2WI (P0. 023), clear boundary (p0. 001 before enhancement, P0. 000 after enhancement), obvious enhancement (P0. 000). Uniform strengthening (P0. 003). The occurrence rate of the following signs in malignant group was significantly higher than that in benign group: the tumor was located in the deep lobe (P0. 024, the accuracy of predicting malignancy was 70%), the signal of T2WI et al (P0. 024, accuracy of predicting malignancy was 67. 9%); Moderate enhancement (P0. 000, accuracy rate of predicting malignancy 69.7%), unclear boundary (before enhancement) (P0. 000, predictive accuracy of malignancy 72.7%), unclear boundary (after enhancement) (P0. 000, predictive accuracy of malignancy 70.9%); Subcutaneous tissue invasion (P0. 000, accuracy rate of predicting malignancy 87.2%), masticatory muscle / parapharyngeal space / facial nerve invasion (P0. 01, predictive accuracy of malignancy 76. 3%), lymph node invasion (P0. 000, predictive accuracy of malignancy 80%); T2WI was uneven (P0. 023, accuracy rate of predicting malignancy 41.8%) and non homogeneous enhancement (P0. 002, accuracy of predicting malignancy 46.7%). Tumor size, age, sex, lesion in left / right parotid lobe, lobulation, TIWI signal, low T2WI signal, mild enhancement, diffuse growth / single focus / multiple focus, unilateral / bilateral, translobar, cystic degeneration, accompanied by bone destruction. P > 0.05, the difference was not statistically significant. Second, supportive MR signs of different tumors. Pleomorphic adenoma was easy to occur in women, with clear boundary, high signal intensity of T2WI, obvious enhancement, and adenomatous lymphoma in male, located in superficial lobe, parotid gland tail, bilateral disease, multi-foci, homogeneous enhancement, moderate enhancement and clear boundary. Basal cell adenoma: surrounded by low signal ring with clear margin; acinar cell carcinoma: lobular, lymph node infiltration; mucoepidermoid carcinoma: lobular, unclear border, lymph node infiltration, cystic change; Squamous cell carcinoma: lobulated, subcutaneous infiltration, uneven TIVI signal; eosinophilic cell carcinoma: female, easily lobulated, deep lobes. Lymphoma: TIWI signal was uneven, moderately enhanced, invasion of masticatory muscle space / parapharyngeal infiltration, diffuse growth, unclear boundary. The occurrence rate of the above signs in the tumor group was significantly higher than that in the other tumor groups (P < 0.05). Conclusion: the tumor is located in deep lobes, with unclear boundary, T2WI signal, moderate enhancement, peripheral tissue and lymph node infiltration indicating parotid malignant tumor. Parotid pleomorphic adenoma, adenomatous lymphoma, basal cell adenocarcinoma, acinar cell carcinoma, mucoepidermoid carcinoma, squamous cell carcinoma, eosinophil carcinoma and lymphoma had corresponding supportive MRI signs.
【學(xué)位授予單位】:浙江大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2014
【分類號(hào)】:R445.2;R739.8
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