J Korean Neurosurg Soc.  2014 Sep;56(3):261-264. 10.3340/jkns.2014.56.3.261.

Value of Perfusion Weighted Magnetic Resonance Imaging in the Diagnosis of Supratentorial Anaplastic Astrocytoma

Affiliations
  • 1Department of Radiology, Seoul National University Bundang Hospital, Seongnam, Korea.
  • 2Department of Radiology, Kyung Hee University Hospital, School of Medicine, Kyung Hee University, Seoul, Korea. euijkim@hanmail.net
  • 3Department of Radiology, Kyung Hee University Hospital at Gangdong, School of Medicine, Kyung Hee University, Seoul, Korea.
  • 4Department of Neurosurgery, Kyung Hee University Hospital at Gangdong, School of Medicine, Kyung Hee University, Seoul, Korea.

Abstract

We report perfusion weighted imaging (PWI) findings of nonenhanced anaplastic astrocytoma in a 30-year-old woman. Brain magnetic resonance imaging showed a nonenhanced brain tumor with mild peritumoral edema on the right medial frontal lobe and right genu of corpus callosum, suggesting a low-grade glioma. However, PWI showed increased relative cerebral blood volume, relative cerebral blood flow, and permeability of nonenhanced brain tumor compared with contralateral normal brain parenchyma, suggesting a high-grade glioma. After surgery, final histopathological analysis revealed World Health Organization grade III anaplastic astrocytoma. This case demonstrates the importance of PWI for preoperative evaluation of nonenhanced brain tumors.

Keyword

Anaplastic astrocytoma; MRI; Perfusion weighted MRI
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