title: Intracerebral Masson's Tumor-Slow-Filling Vascular Lesion Demonstrated by Indocyanine Green Video Angiography.
abstract: BACKGROUND
  Intravascular papillary endothelial hyperplasia, or Masson's tumors, are benign vascular lesions that are rarely seen intracranially. The vascular characteristics of these lesions are also unknown.
  
  
  METHODS
  We report the case of a 24-year-old male patient with a 3-year history of headache and dizziness. Neuroradiologic imaging showed a slow-growing lesion consistent with a low-grade glioma. Intraoperative appearance was of a vascular lesion that was slow filling as demonstrated with indocyanine green video angiography. Histologic analysis following resection revealed intravascular papillary endothelial hyperplasia (Masson's tumor).
  
  
  CONCLUSIONS
  Masson's tumors are slow-filling vascular lesions. The preoperative diagnosis of this lesion is difficult as it can mimic a neoplastic lesion. Conservative and surgical treatment options should therefore be carefully considered. Patients with subtotal resection must undergo long-term follow-up surveillance imaging as recurrence is a possibility.
authors.affiliation: Department of Neurosurgery, Royal Hallamshire Hospital, Sheffield, United Kingdom. Electronic address: vbagga@doctors.org.uk.
authors.forename: Veejay
authors.initials: V
authors.lastname: Bagga
authors.affiliation: Department of Neurosurgery, Royal Hallamshire Hospital, Sheffield, United Kingdom.
authors.forename: Ahilan
authors.initials: A
authors.lastname: Kailaya-Vasan
authors.affiliation: Department of Histopathology, Royal Hallamshire Hospital, Sheffield, United Kingdom.
authors.forename: Stephen B
authors.initials: SB
authors.lastname: Wharton
authors.affiliation: Department of Neurosurgery, Royal Hallamshire Hospital, Sheffield, United Kingdom.
authors.forename: Umang
authors.initials: U
authors.lastname: Patel
mesh_terms: D001932:Brain Neoplasms / Q000000981:diagnostic imaging* / Q000601:surgery; D002533:Cerebral Angiography / Q000379:methods*; D006801:Humans; D007208:Indocyanine Green / Q000008:administration & dosage*; D008297:Male; D019043:Vascular Neoplasms / Q000000981:diagnostic imaging* / Q000601:surgery; D020535:Video-Assisted Surgery / Q000379:methods*; D055815:Young Adult
chemical_list: D007208:Indocyanine Green
keywords: Indocyanine green video angiography; Intravascular papillary endothelial hyperplasia; Masson's tumor