嗅神经母细胞瘤的CT和MR影像学表现

CT and MR features of esthesioneuroblastoma

为了探讨嗅神经母细胞瘤的CT和MR的影像特征,回顾性分析42例经病理确诊的嗅神经母细胞瘤的CT和MR表现。42例患者中2例局限于鼻腔中后部;18例局限于鼻腔和鼻窦;22例侵入颅内;9例伴随颈淋巴结转移。15例肿瘤密度或信号均匀,27例密度或信号不均匀,42例增强后明显强化,其中32例不均匀强化。初步研究结果提示,嗅神经母细胞瘤发病部位多数位于鼻腔中后部,强化显著,呈浸润性生长,易侵犯副鼻窦、眼眶及颅内,颈部淋巴结转移少见。

The objective of this study was to analyze the CT and MR imaging features of esthesioneuroblastoma（ENB）.The CT and MR records of 42 cases of esthesioneuroblastoma confirmed by pathology were reviewed.Two lesions were confined to the postmedian of the nasal cavity;18 lesions were confined to the nasal cavity and paranasal sinuses;22 lesions eroded into the intracranial;there were 9 patients with cervical lymph node metastasis.The densities or signal intensities of the masses were homogeneous in 15 cases,and the other 27 cases were heterogeneous.It showed enhancement on contrast images in 42 cases,including heterogeneous enhancement in 32 cases.The preliminary study results suggest that esthesioneuroblastoma often locats in the postmedian of the nasal cavity,with the marked enhancement on the contrast image.CT and MR easily show the destruction of the walls of ethmoidal sinuses and the extension of the mass into orbit and brain,and the cervical lymph node metastasis is rare.