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Grade II oligodendroglioma localized to the corpus callosum

Department of Neurological Surgery, UPMC Presbyterian, University of Pittsburgh Medical Center, Suite B-400, 200 Lothrop Street, Pittsburgh, PA 15213, USA.
Brain Tumor Pathology (Impact Factor: 2.28). 07/2011; 28(4):305-9. DOI: 10.1007/s10014-011-0054-0
Source: PubMed

ABSTRACT The presence of a primary central nervous system (CNS) neoplasm within the corpus callosum generally portends a grave prognosis. Common pathologies encountered include glioblastomas and primary CNS lymphomas. In contrast, World Health Organization grade II oligodendroglial tumors demonstrating loss of heterozygosity at 1p and 19q are generally less aggressive, often responding favorably to chemotherapy. The authors present a case of a primary brain tumor isolated to the corpus callosum diagnosed as a grade II oligodendroglioma. A 52-year-old woman presented with new-onset generalized seizure. Magnetic resonance imaging (MRI) revealed a non-contrast-enhancing lesion with associated edema and regional mass effect. The patient underwent a craniotomy and subtotal resection of the lesion using an endoscopic port. Pathological examination revealed a grade II oligodendroglioma. Molecular analysis identified 1p and 19q deletion as well as MGMT promoter methylation. The patient subsequently underwent adjuvant radiation therapy with an excellent response. We present, to our knowledge, the first report of a grade II oligodendroglioma isolated within the corpus callosum with the characteristic molecular features of this tumor type. Histopathologic diagnosis is essential to appropriately guide therapy of callosal tumors.

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    • "However, the relatively small number of reported cases with schizophrenia and corpus callosum abnormalities, along with the uncertain prevalence of such anomalies in the normal population, does not allow establishing a causal relationship [2] [3]. Also tumors of the corpus callosum can be present with dementia, depression, schizophrenia, and psychosis [8] [9] [10] [11] [12] [13] [14]. Usually the tumors are so big that it is not easy to assess whether the primary cause of symptoms is the damage of corpus callosum or the involvement of other adjacent structures. "
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    ABSTRACT: Psychiatric symptoms may occasionally be related to anatomic alterations of brain structures. Particularly, corpus callosum lesions seem to play a role in the change of patients' behavior. We present a case of a sudden psychotic attack presumably due to a hemorrhagic cavernous angioma of the corpus callosum, which was surgically removed with complete resolution of symptoms. Although a developmental defect like agenesis or lipoma is present in the majority of these cases, a growing lesion of the corpus callosum can rarely be the primary cause. Since it is potentially possible to cure these patients, clinicians should be aware of this association.
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