title: Isolated angiitis of the central nervous system with tumor-like lesion, mimicking brain malignant glioma: a case report and review of the literature.
abstract: BACKGROUND
  Isolated angiitis of the central nervous system (IACNS) is a rare but severe vascular disease, which could present like an isolated inflammatory lesion on magnetic resonance imaging (MRI). To date, only a few such cases with tumor-like IACNS have been reported.
  
  
  METHODS
  A 35-year-old woman presented with headache and left-sided weakness. MRI scans initially mislead us to a diagnosis of glioblastoma (GBM). Surgery was performed. The mass was sub-totally resected. Pathological examination confirmed a cerebral vasculitis. Radiological features, such as disproportionate mass effect, striped hemorrhage and abnormal enhancement of adjacent vessels, could be helpful to distinguish a tumor-like IACNS from a GBM. Single therapy with high doses of steroid did not improve the patient's condition. Combined therapy with prednisolone and cyclophosphamide showed great benefit to the patient. No relapse occurred during the period of 18 months follow-up.
  
  
  CONCLUSIONS
  Although a tumor-like IACNS has no established imaging features, a diagnosis of tumor-like IACNS should be suspected when MRI shows inappropriate presentations of a tumor. Greater awareness of this potential manifestation of IACNS may facilitate more prompt diagnosis and treatment.
authors.affiliation: Department of Neurosurgery, Beijing Tiantan Hospital, Capital Medical University, Beijing 100050, China.
authors.forename: Gan
authors.initials: G
authors.lastname: You
authors.forename: Wei
authors.initials: W
authors.lastname: Yan
authors.forename: Wei
authors.initials: W
authors.lastname: Zhang
authors.forename: Shaowu
authors.initials: S
authors.lastname: Li
authors.forename: Guilin
authors.initials: G
authors.lastname: Li
authors.forename: Tao
authors.initials: T
authors.lastname: Jiang
mesh_terms: D000328:Adult; D000970:Antineoplastic Agents / Q000627:therapeutic use; D001706:Biopsy; D001932:Brain Neoplasms / Q000175:diagnosis*; D003937:Diagnosis, Differential; D005260:Female; D005500:Follow-Up Studies; D005910:Glioma / Q000175:diagnosis*; D006801:Humans; D008279:Magnetic Resonance Imaging; D019635:Neurosurgical Procedures; D020293:Vasculitis, Central Nervous System / Q000473:pathology* / Q000628:therapy
chemical_list: D000970:Antineoplastic Agents