title: Clinical and Radiological Characteristics of Angiomatous Meningiomas.
abstract: BACKGROUND
  Angiomatous meningioma is a rare histological subtype of meningioma. Therefore, this specific medical condition is rarely reviewed in the literature. In the present work, we report the clinical and radiological features with postoperative outcomes of angiomatous meningioma.
  
  
  METHODS
  This retrospective study included the patients who were pathologically diagnosed with angiomatous meningioma after surgical resection between February 2010 and September 2015 in our institute. We analyzed the clinical data, radiological manifestation, treatment and prognosis of all patients.
  
  
  RESULTS
  The 15 patients (5 males and 10 females) were diagnosed with angiomatous meningioma during the study period. The median age of patients at the time of surgery was 63 years (range: 40 to 80 years). According to Simpson classification, 7, 5, and 3 patients achieved Simpson grade I, II, and IV resection, respectively. In the follow-up period, recurrence was noted in one patient. Ten out of the 15 patients showed homogeneous enhancement. Two patients demonstrated cystic changes. There was no occurrence of calcification or hemorrhage in our patients. Characteristically, 14 out of 15 patients showed signal voids of vessels. Significant peritumoral edema was observed in the majority of tumors (67%).
  
  
  CONCLUSIONS
  Angiomatous meningiomas are rare benign meningioma. Brain images of angiomatous meningioma usually demonstrate signal void signs and peritumoral edema. In the present study, angiomatous meningiomas showed good prognosis after surgical resection.
authors.affiliation: Department of Neurosurgery, Samsung Medical Center, Sungkyunkwan University College of Medicine, Seoul, Korea.
authors.forename: Juyoung
authors.initials: J
authors.lastname: Hwang
authors.affiliation: Department of Neurosurgery, Samsung Medical Center, Sungkyunkwan University College of Medicine, Seoul, Korea.
authors.forename: Doo-Sik
authors.initials: DS
authors.lastname: Kong
authors.affiliation: Department of Neurosurgery, Samsung Medical Center, Sungkyunkwan University College of Medicine, Seoul, Korea.
authors.forename: Ho Jun
authors.initials: HJ
authors.lastname: Seol
authors.affiliation: Department of Neurosurgery, Samsung Medical Center, Sungkyunkwan University College of Medicine, Seoul, Korea.
authors.forename: Do-Hyun
authors.initials: DH
authors.lastname: Nam
authors.affiliation: Department of Neurosurgery, Samsung Medical Center, Sungkyunkwan University College of Medicine, Seoul, Korea.
authors.forename: Jung-Il
authors.initials: JI
authors.lastname: Lee
authors.affiliation: Department of Neurosurgery, Samsung Medical Center, Sungkyunkwan University College of Medicine, Seoul, Korea.
authors.forename: Jung Won
authors.initials: JW
authors.lastname: Choi
keywords: Angiomatous meningioma; Brain edema; Magnetic resonance imaging; Recurrence