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目的探讨嗅神经母细胞瘤的MRI诊断价值。方法对14例经病理证实的嗅神经母细胞瘤MRI资料进行回顾性分析。结果14例中10例肿块中心位于鼻腔顶部的中后方,1例位于鼻腔顶部的前方,1例占据整个鼻腔,1例位于上颌窦,1例位于鼻咽部。8例形态不规则,边界不清;6例形态规则,边界较清楚。肿块信号多不均匀,在T1WI以等或略低信号为主,T2WI以等或稍高信号为主,明显强化。肿瘤侵犯筛窦12例、颅内11例、眼眶10例、蝶窦5例、鼻中隔上部5例、上颌窦4例、额窦3例、翼腭窝2例、鼻咽2例、视神经管2例、斜坡1例、鼻泪管1例、面颊部1例。结论鼻腔顶部的中后方肿块并穿越筛板侵犯嗅沟区,是嗅神经母细胞瘤的特征性改变。MRI可准确显示肿瘤的部位和侵犯范围,可为临床分期和制订治疗方案提供依据。
Objective To investigate the value of MRI in the diagnosis of olfactory neuroblastoma. Methods MRI data of 14 patients with pathologically confirmed olfactory neuroblastoma were analyzed retrospectively. Results Among the 14 cases, 10 cases were located in the middle and posterior of the top of the nasal cavity, one in front of the top of the nasal cavity, one in the entire nasal cavity, one in the maxillary sinus and one in the nasopharynx. 8 cases of irregular shape, the border is unclear; 6 cases of rules, the border more clearly. Tumor signal uneven, T1WI equal or slightly lower signal-based, T2WI equal or slightly higher signal-based, significantly enhanced. 12 cases of tumor invasion of the ethmoid, intracranial 11 cases, 10 cases of orbital, sphenoid sinus in 5 cases, upper nasal septum in 5 cases, 4 cases of maxillary sinus, frontal sinus in 3 cases, pterygopalatine fossa in 2 cases, nasopharyngeal in 2 cases, optic canal 2 For example, 1 case of slope, 1 case of nasolacrimal duct and 1 case of cheek. Conclusion The middle and posterior mass at the top of the nasal cavity infiltrating the olfactory groove through the sieve plate is a characteristic change of olfactory neuroblastoma. MRI can accurately show the location of the tumor and the extent of violations can provide the basis for clinical staging and the development of treatment options.