口咽部恶性肿瘤的CT和MRI诊断

目的：探讨CT和MRI对口咽恶性肿瘤的诊断价值，了解口咽癌及口咽恶性淋巴瘤的诊断及鉴别诊断要点。方法：搜集42例经病理证实的口咽恶性肿瘤资料，对口咽癌与口咽恶性淋巴瘤的CT和MRI征象进行分析，并对结果进行统计学处理。结果：口咽癌26例，恶性淋巴瘤16例。26例口咽癌均为单侧发病，20例形态不规则，17例边界不清，其中13例侵犯邻近结构，18例密度（信号）不均匀，内可见囊变或坏死区；增强后19例明显不均匀强化。16例淋巴瘤中，3例为双侧发病，¨例形态规则，13例边界清楚，12例密度（信号）均匀，增强后12例轻中度强化。口咽癌与口咽恶性淋巴瘤在形态、边界及侵犯邻近结构、密度（信号）、强化程度等方面（P〈0．05）差异有统计学意义。26例口咽癌中有15例发现颈部淋巴结转移，单侧转移lO例，双侧转移5例；口咽恶性淋巴瘤中9例合并颈部淋巴结肿大，其中单侧肿大6例，双侧肿大3例。结论：口咽癌与口咽恶性淋巴瘤CT和MRI表现具有一定特征性，CT和MRI结合可以提高病变诊断准确性，从而为I临床治疗提供帮助。

CT and MRI Diagnosis of Oropharyngeal Malignant Tumors

Objective:To study the role of CT and MRI in diagnosing oropharyngeal malignant tumor and discuss the key points in the diagnosis and differentiation of oropharyngeal carcinoma(OC) and lymphoma.Methods:42 cases with pathologically-proved oropharyngeal malignant tumors were collected.CT and MRI signs of OC and lymphoma were analyzed.Results:All 26 cases of OC were unilateral,in which 20 cases showed irregular shape,17 cases showed a vague margin and 13 cases showed invasion to surrounding structures.Inhomoge...