Role of perfusion-weighted imaging at 3T in the histopathological differentiation between astrocytic and oligodendroglial tumors

The differentiation of oligodendroglial tumors from astrocytic tumors is important clinically, because oligodendroglial tumors are more chemosensitive than astrocytic tumors. This study was designed to clarify the usefulness of 3T MR perfusion imaging (PWI) in the histopathological differentiation b...

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Bibliographic Details
Published in:European journal of radiology 2012-08, Vol.81 (8), p.1863-1869
Main Authors: Saito, Taiichi, Yamasaki, Fumiyuki, Kajiwara, Yoshinori, Abe, Nobukazu, Akiyama, Yuji, Kakuda, Takako, Takeshima, Yukio, Sugiyama, Kazuhiko, Okada, Yoshikazu, Kurisu, Kaoru
Format: Article
Language:English
Subjects:
Adolescent
Adult
Aged
Aged, 80 and over
Astrocytoma
Astrocytoma - pathology
Brain Neoplasms - pathology
Child
Diagnosis, Differential
Female
Glioma
Humans
Magnetic Resonance Angiography - methods
Magnetic resonance imaging
Male
Middle Aged
Oligodendroglioma
Oligodendroglioma - pathology
Perfusion imaging
Reproducibility of Results
Sensitivity and Specificity
Young Adult
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Summary:The differentiation of oligodendroglial tumors from astrocytic tumors is important clinically, because oligodendroglial tumors are more chemosensitive than astrocytic tumors. This study was designed to clarify the usefulness of 3T MR perfusion imaging (PWI) in the histopathological differentiation between astrocytic and oligodendroglial tumors. This is because there is a growing interest in the diagnostic performance of 3T MR imaging, which has the advantages of a higher signal-to-noise ratio (SNR) and greater spatial and temporal resolution. This study retrospectively included 24 consecutive patients with supratentorial, WHO grade II and III astrocytic and oligodendroglial tumors (7 astrocytic, 10 oligoastrocytic, and 7 oligodendroglial tumors) that were newly diagnosed and resected between November 2006 and December 2009 at Hiroshima University Hospital. These patients underwent dynamic susceptibility contrast-enhanced (DSC) PWI relative cerebral blood volume (rCBV) measurements before treatment. Astrocytic tumors were designated as the astrocytic group, and oligoastrocytic and oligodendroglial tumors as the oligodendroglial group. The regions of interest with the maximum rCBV values within the tumors were normalized relative to the contra-lateral white matter (rCBVmax). The average rCBVmax of astrocytic tumors (2.01±0.68) was significantly lower than that of the oligoastrocytic (4.60±1.05) and oligodendroglial tumors (6.17±0.867) (P
ISSN:0720-048X
1872-7727
DOI:10.1016/j.ejrad.2011.04.009