Restricted Diffusion in a Thrombosed Anterior Cerebral Artery Aneurysm Mimicking a Dermoid Cyst

Johanna T. Fifi, Ricardo Komotar, Philip Meyers, Alexander Khandji, Kurenai Tanji, E. Sander Connolly

Research output: Contribution to journalArticle

2 Scopus citations


A neurologically intact 37-year-old woman presented with an acute severe frontal headache after a month of intermittent headaches. Multimodal radiological examination including computed tomography scan, magnetic resonance imaging, and conventional angiography demonstrated a 1 cm mass in the anterior interhemispheric region with heterogenous calcifications. Of note, MR revealed restricted diffusion within the mass. The presumptive diagnosis of dermoid tumor was made and the patient was scheduled for surgical resection. On operative exploration, a 1 cm thrombosed aneurysm was revealed. Thrombosed aneurysms must be considered in the differential diagnosis for midline cerebral masses with negative angiogram and restricted diffusion. This distinction has implications for the clinical management of the patient.

Original languageEnglish (US)
Pages (from-to)85-88
Number of pages4
JournalJournal of Neuroimaging
Issue number1
StatePublished - Jan 1 2012



  • Dermoid cyst
  • Diffusion imaging
  • Thrombosed aneurysm

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging
  • Clinical Neurology

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