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Primary intracranial leiomyosarcoma (LMS) is an extremely rare tumor of the central nervous system. Only sporadic case reports have been published, and therefore data regarding long-term prognosis remain scarce. A 76-year-old woman presented with a right parietal mass, which had grown rapidly in the month prior to admission. Neuroimaging showed a resemblance to intraosseous meningioma. Gross total resection of the tumor was achieved, and histological diagnosis confirmed LMS. Because positron emission tomography (PET) with fluorodeoxyglucose (FDG) just after the resection showed no abnormal uptake, we diagnosed the tumor as primary intracranial LMS. Follow-up PET at 16 months after treatment showed two foci of FDG uptake in the bilateral lungs. Histological diagnosis by surgical resection identified the lesions as lung metastases of LMS. In addition, follow-up head magnetic resonance imaging (MRI) at 31 months showed local recurrence, and we conducted salvage therapy using CyberKnife system (Accuray incorporated) and pazopanib. To date, for 15 months after local recurrence, she is alive with intracranial recurrent disease remained inactive.

nmc case report journal

Pazopanib-mediated Long-term Disease Stabilization after Local Recurrence and Distant Metastasis of Primary Intracranial Leiomyosarcoma: A Case Report on the Efficacy of Pazopanib as a Salvage Therapy