title: Dynamic study of methionine positron emission tomography in patients with glioblastoma with oligodendroglial components.
abstract: Anaplastic oligoastrocytoma (AOA) with necrosis is classified as glioblastoma (GBM) with oligodendroglioma component (GBMO), according to the 2007 World Health Organization classification. The prognosis of GBMO remains controversial because definitive diagnostic criteria regarding the percentage of the oligodendroglial components (OC) in the GBM do not exist. We previously reported dynamic methionine (MET) positron emission tomography (PET) in patients with these tumors. A significant decrease in the MET signal was seen in oligodendrocytic tumors, in contrast to a significant MET increase in GBMs. In this study, we analyzed the dynamic MET PET signal in four patients with primary (n = 2) and secondary (n = 2) GBMOs. Static PET scanning was performed in three consecutive phases. Both cases of primary GBMOs and one case of secondary GBMO presented with a gradual decrease in MET PET signal over the consecutive phases. In contrast, the remaining case of secondary GBMO presented with a pattern of slight increase. It is likely that the dynamic change of MET in patients with GBMO resemble those in patients with oligodendroglial tumor, however, further studies are needed to confirm them. We discuss the mechanisms from a viewpoint of pathological findings.
authors: Department of Neurosurgery, Gifu University Graduate School of Medicine, 1-1 Yanagido, Gifu, 501-1194, Japan. hirohito@gifu-u.ac.jp.
authors: Hirohito
authors: H
authors: Yano
authors: Department of Neurosurgery, Gifu University Graduate School of Medicine, 1-1 Yanagido, Gifu, 501-1194, Japan.
authors: Naoyuki
authors: N
authors: Ohe
authors: Department of Neurosurgery, Gifu University Graduate School of Medicine, 1-1 Yanagido, Gifu, 501-1194, Japan.
authors: Noriyuki
authors: N
authors: Nakayama
authors: Department of Neurosurgery, Chubu Medical Center for Prolonged Traumatic Brain Dysfunction, Kizawa Memorial Hospital, 639 Shimo-kobi, Kobi-cho, Minokamo, 505-8503, Japan.
authors: Yu-Ichi
authors: Y
authors: Nomura
authors: Department of Neurosurgery, Gifu Prefectural Gero Hot Spring Hospital, 2211 Mori, Gero, 509-2292, Japan.
authors: Kazuhiro
authors: K
authors: Miwa
authors: Department of Neurosurgery, Chubu Medical Center for Prolonged Traumatic Brain Dysfunction, Kizawa Memorial Hospital, 639 Shimo-kobi, Kobi-cho, Minokamo, 505-8503, Japan.
authors: Jun
authors: J
authors: Shinoda
authors: Department of Neurosurgery, Gifu University Graduate School of Medicine, 1-1 Yanagido, Gifu, 501-1194, Japan.
authors: Toru
authors: T
authors: Iwama
mesh_terms: D000328:Adult; D000368:Aged; D001932:Brain Neoplasms / Q000098:blood supply / Q000000981:diagnostic imaging* / Q000473:pathology* / Q000628:therapy; D017809:Fatal Outcome; D005260:Female; D005909:Glioblastoma / Q000098:blood supply / Q000000981:diagnostic imaging* / Q000473:pathology* / Q000628:therapy; D006801:Humans; D008279:Magnetic Resonance Imaging; D008297:Male; D008715:Methionine; D009836:Oligodendroglia / Q000000981:diagnostic imaging* / Q000473:pathology*; D049268:Positron-Emission Tomography / Q000379:methods*
chemical_list: D008715:Methionine
keywords: Dynamic; Glioblastoma with oligodendroglial component; Methionine; PET; Pathology