title: Intracranial Undifferentiated Sarcoma Arising from a Low-Grade Glioma: A Case Report and Literature Review.
abstract: Undifferentiated sarcomas are rarely identified in the intracranial region. A 23-year-old man was admitted with a chief complaint of headache. Initial magnetic resonance images showed signs of low-grade glioma in the frontal lobe. Stereotactic biopsy was performed, and a diagnosis of diffuse astrocytoma was confirmed. Three months later, the patient presented with a high-grade tumor as seen on imaging studies. He underwent total resection of the tumor and histopathological tests identified an undifferentiated sarcoma. The patient died eight months later due to massive tumor bleeding. To the best of our knowledge, this is the first report of undifferentiated sarcoma arising from low-grade glioma without any chemotherapy or radiotherapy.
authors.affiliation: Department of Neurosurgery, Korea University Guro Hospital, Seoul, Korea.
authors.forename: Bum-Joon
authors.initials: BJ
authors.lastname: Kim
authors.affiliation: Department of Neurosurgery, Korea University Guro Hospital, Seoul, Korea.
authors.forename: Jong-Hyun
authors.initials: JH
authors.lastname: Kim
authors.affiliation: Department of Neurosurgery, Korea University Guro Hospital, Seoul, Korea.
authors.forename: Hung-Seob
authors.initials: HS
authors.lastname: Chung
authors.affiliation: Department of Neurosurgery, Korea University Guro Hospital, Seoul, Korea.
authors.forename: Taek-Hyun
authors.initials: TH
authors.lastname: Kwon
keywords: Intracranial undifferentiated sarcoma; Low-Grade glioma; Malignant fibrous histiocytoma; Malignant transformation; Stereotactic biopsy