鼻咽部良性病变的CT诊断(附33例分析)

目的：探讨鼻咽部良性病变的CT表现和鉴别诊断。资料与方法：分析33例鼻咽部良性病变的CT资料，重点观察病变部位、咽旁软组织间隙、咽缝、副鼻窦及颈部淋巴结改变。结果：（1）单纯咽隐窝膨隆或突出5例；（2）后顶壁软组织增厚或“山丘”状突起或合并咽隐窝闭塞28例；（3）25例咽缝存在，14例合并副鼻窦炎症。结论：单纯后顶壁软组织增厚不累及咽缝，无咽旁间隙侵犯和颈部淋巴结恶性转移征象者可作出良性病变CT诊断：咽隐窝膨隆或肿块，确诊依靠病理活检。

CT Diagnosis of Benign Nasopharyngeal Lesions: An Analysis of 33 Cases

Objective To discuss CT features and differentiation of the benign nasopharyngeal lesions.Materials and Methods CT findings in 33 cases with benign nasopharyngeal lesions were retrospectively analyzed. Observation was focused on the lesion's site, parapharyngeal soft tissue space, nasopharyngeal raphe, paranasal sinuses and cervical lymph nodes.Results The following three findings were noticed on CT: (1) bulging or protrusion of the pharyngeal recess (n=5), (2) soft tissue thickening or buninoid projection of the nasopharyngeal superior posterior wall, or together with occluded pharyngeal recess (n=28), and (3) nasopharyngeal raphe (n=25) and paranasal sinusitis (n=14).Conclusion Soft tissue thickening of the superior posterior wall only, with neither the involvement of nasopharyngeal raphe and parapharyngeal space nor the metastasis of cervical lymph nodes, can be regarded as the sign of benign lesions. When bulging or protrusion of the pharyngeal recess is present, the diagnosis should be based on pathological result.