Subependymoma is a slow-growing, exophytic, intraventricular glial neoplasm that commonly arises in the ventricular system. However, a report found that the frequency of intracerebral subependymoma was 0.4% in 1000 routine autopsies. To the best of our knowledge, only seven cases of intracerebral subependymoma have been reported. We report a rare case of intracerebral subependymoma in a child. An 11-year-old girl with generalized tonic-clonic seizures visited the emergency room and had an intraparenchymal tumor on the left frontal lobe on magnetic resonance imaging (MRI). Craniotomy with gross total removal was performed without any perioperative morbidities. The tumor was finally histopathologically diagnosed as a subependymoma.

室间隔膜下瘤是一种生长缓慢的，外生性的脑室内神经胶质瘤，通常出现在心室系统中。然而，一份报告发现，在1000例常规尸检中，脑室内室间隔膜瘤的发生率为0.4％。据我们所知，仅报告了7例脑室下室间隔瘤。我们报告了一个儿童脑内室间隔膜瘤的罕见病例。一名患有全身性强直阵挛性癫痫发作的11岁女孩在急诊室就诊，并通过磁共振成像（MRI）在左额叶上有实质性肿瘤。开颅手术，全切除，无围手术期并发症。最终，该肿瘤在组织病理学上被诊断为室管膜下瘤。