Abstract：
BACKGROUND: Schwannomas are benign tumors that arise from Schwann cells. Rare cases are shown to arise from the olfactory nerve. The genesis of Olfactory groove schwannoma (OGSs) is still puzzling. Yusda et al hypothesized that olfactory ensheathing cell tumors (OECTs) might be the origin of OGSs.
METHODS: Here, the authors report the case of a 59-year-old woman who presented with a paroxysmal headache for 1 year. The tumor appeared as hypointensity on T1-weighted images, hyperintensity on T2-weighted, and exhibited strong, heterogeneous enhancement. The tumor was removed through a lateral supraorbital approach. The final pathologic diagnosis was schwannoma. The postoperative period was uneventful after 4 months, and the headache disappeared.
UNASSIGNED: OGSs and OECTs are extremely rare. There are many similarities in clinical manifestations, images, and pathologic findings. OGSs are difficult to distinguish from OECTs.
METHODS: Here, the authors report the case of a 59-year-old woman who presented with a paroxysmal headache for 1 year. The tumor appeared as hypointensity on T1-weighted images, hyperintensity on T2-weighted, and exhibited strong, heterogeneous enhancement. The tumor was removed through a lateral supraorbital approach. The final pathologic diagnosis was schwannoma. The postoperative period was uneventful after 4 months, and the headache disappeared.
UNASSIGNED: OGSs and OECTs are extremely rare. There are many similarities in clinical manifestations, images, and pathologic findings. OGSs are difficult to distinguish from OECTs.
摘要：
背景：神经鞘瘤是由雪旺氏细胞产生的良性肿瘤。罕见的病例显示是由嗅神经引起的。嗅沟神经鞘瘤（OGS）的起源仍然令人困惑。Yusda等人假设嗅鞘细胞肿瘤（OECT）可能是OGS的起源。
方法：这里，作者报告了一例59岁女性，她出现阵发性头痛1年。肿瘤在T1加权图像上表现为低张力，T2加权的高强度，并表现出强大，异质增强。通过眶上外侧入路切除肿瘤。最终病理诊断为神经鞘瘤。术后4个月时间顺利，头痛消失了。
■OGS和OECT极为罕见。临床表现有许多相似之处，images,和病理结果。OGS很难与OECT区分开来。
方法：这里，作者报告了一例59岁女性，她出现阵发性头痛1年。肿瘤在T1加权图像上表现为低张力，T2加权的高强度，并表现出强大，异质增强。通过眶上外侧入路切除肿瘤。最终病理诊断为神经鞘瘤。术后4个月时间顺利，头痛消失了。
■OGS和OECT极为罕见。临床表现有许多相似之处，images,和病理结果。OGS很难与OECT区分开来。
