Pediatric intraparenchymal meningioma in the basal ganglia treated with gross total resection: a case report and review of the literature.

INTRODUCTION: Intraparenchymal meningiomas in the basal ganglia are extremely rare, and to the best of our knowledge, only three case reports have been published to date. Owing to concerns regarding major vessels, gross total resection (GTR) is difficult to achieve; therefore, subtotal resection and radiation therapy are often chosen as treatment options. We present a pediatric case with an intraparenchymal meningioma in the left basal ganglia that was successfully treated with GTR. We also reviewed the relevant literature to discuss the pathogenesis, radiological findings, and treatment methods of this rare disease. CASE REPORT: A 4-year-old girl presented with progressive right facial paralysis, aphasia, and right incomplete hemiplegia. Imaging revealed a mass lesion in the left basal ganglia and unilateral obstructive hydrocephalus. Neuroendoscopic septostomy, tumor biopsy, and cerebrospinal fluid reservoir placement were performed, and the initial pathological diagnosis was suspected glioma. Thus, craniotomy was performed to remove the tumor, which was white, elastic, and well-defined. Intraoperative rapid pathology revealed a meningioma. Postoperatively, the patient experienced transient worsening of the right incomplete hemiplegia, which subsequently improved. The final pathological diagnosis was a fibrous meningioma. CONCLUSION: Surgery for intraparenchymal meningiomas in the basal ganglia is challenging owing to the proximity of major blood vessels; however, GTR may be preferable to subtotal resection, considering the possibility of recurrence. Even in cases of intraparenchymal tumors, it is important to consider meningioma as a differential diagnosis and to carefully plan the appropriate treatment.