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Samuel S. Gerber and Reuben Plotkin

A lthough lipomas are found in most parts of the body, intracranial lipomas are extremely unusual. Rokitansky 14 was the first to describe lipoma of the corpus callosum in 1856; his case was found at autopsy. Sosman 15 in 1939 reported the first case diagnosed in a living patient. Review of the literature shows 85 such cases, including the case we are reporting here. Case Report This 35-year-old white man presented with a history of headaches for the past year, increasing in severity. At the time of presentation the headaches were disabling. He had

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Lorenzo Rinaldo, David S. Priemer, Alexander O. Vortmeyer, Aaron A. Cohen-Gadol, Daniel J. Brat, Anita Mahajan, Caterina Giannini, and Terry C. Burns

C hordomas are rare neoplasms originating from notochordal remnants that typically occur along the axial skeleton. 26 Rostral to the craniocervical junction, chordomas are most commonly found within the bone of midline skull base structures, 42 although exclusively intradural chordomas have been previously reported. 1 In this paper we report an exceptionally rare case of a primary chordoma originating in the splenium of the corpus callosum. To the best of our knowledge, a chordoma in this location has not been previously described. Albeit extremely rare, this

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Koreaki Mori

G iant interhemispheric cysts are rare lesions which, until the advent of magnetic resonance (MR) imaging, were mainly diagnosed by computerized tomography (CT). Various types of cystic lesions occur in the interhemispheric area. Often they are associated with agenesis of the corpus callosum, but there is no uniformity in pathogenesis among previously reported cases. These cysts should be differentiated from one another, as the prognostic and therapeutic implications may differ. Four large interhemispheric cystic lesions presenting at four different

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Keisuke Maruyama, Masahiro Shin, Masao Tago, Hiroki Kurita, Shunsuke Kawamoto, Akio Morita, and Takaaki Kirino

A rteriovenous malformations of the corpus callosum comprise 8 to 9% of all cerebral AVMs, 1, 11 and frequently occupy extensive areas in the cerebral parenchyma, involving the anterior cerebral arteries or the vein of Galen. There have been several reports on surgical attempts to remove these lesions, but have resulted primarily in clarifying the limitations and the technical difficulty of performing microsurgery. 3, 12, 13 Despite recent advances, complete resection of AVMs in this region without damaging those adjacent critical structures is sometimes

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Lillian C. Solt, John H. N. Deck, Roger Scott Baim, and Karl TerBrugge

A total of 10 interhemispheric cysts have been described, in association with complete or partial agenesis of the corpus callosum. 2, 7, 8, 12, 15, 19 The histological features of the cyst wall in these cases have been variable. Tissues identified as components of the reported cysts include arachnoid, 12 glial tissue, 19 choroid plexus epithelium, and ependyma. 9 Most of the cases of interhemispheric cyst and partial or total agenesis of the corpus callosum were found in young children, 7, 9, 15 and were reported before the advent of computerized

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Hugues Duffau, Ihab Khalil, Peggy Gatignol, Dominique Denvil, and Laurent Capelle

A lthough still a matter of debate, numerous authors currently advocate surgery in the treatment of supratentorial LGGs. 9, 10, 16, 51, 64, 77, 82, 84, 95, 96 Nonetheless, it seems that glioma resection should be the most extensive possible to have a real impact on the natural history of this kind of tumor. 9, 16 Furthermore, it has been well demonstrated that gliomas migrate along myelinated fiber tracts of white matter, 6, 41, 42, 52, 59, 81, 108 in particular, with frequent invasion of the corpus callosum and thus with a risk of contralateral

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Aaron A. Cohen-Gadol, Jeffrey W. Britton, Clifford R. Jack Jr., Jonathan A. Friedman, and W. Richard Marsh

underlying the development of these transient lesions are unknown. We report a transient abnormality revealed on MR imaging in the splenium of corpus callosum following an uncomplicated seizure in a patient undergoing routine presurgical evaluation. Case Report This 27-year-old right-handed man presented for evaluation of medically refractory partial epilepsy present since 1 year of age. He had no history of developmental delay, meningitis, encephalitis, or significant head injury, and his neurological examination was normal. Magnetic resonance imaging of the head

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Hidetoshi Matsukawa, Masaki Shinoda, Motoharu Fujii, Osamu Takahashi, Daisuke Yamamoto, Atsushi Murakata, and Ryoichi Ishikawa

, the corpus callosum, and gait in the elderly . Stroke 40 : 3816 – 3820 , 2009 3 Caillé S , Sauerwein HC , Schiavetto A , Villemure JG , Lassonde M : Sensory and motor interhemispheric integration after section of different portions of the anterior corpus callosum in nonepileptic patients . Neurosurgery 57 : 50 – 59 , 2005 4 Chao YP , Cho KH , Yeh CH , Chou KH , Chen JH , Lin CP : Probabilistic topography of human corpus callosum using cytoarchitectural parcellation and high angular resolution diffusion imaging

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Danielle S. Goulding, R. Caleb Vogel, Chirayu D. Pandya, Crystal Shula, John C. Gensel, Francesco T. Mangano, June Goto, and Brandon A. Miller

imaging. All imaging was performed with a Zeiss Axio Scan.Z1 at magnification ×20. Quantitative Analysis of Immunohistochemistry and Immunofluorescence Semiautomated, quantitative analysis was performed for both immunohistochemical and immunofluorescent scanned slides using HALO software (version 2.2, Indica Labs). All analysis was performed by a technician blinded to experimental groups. The corpus callosum of sagittal sections was delineated for analysis and thresholds for positive staining set for use across all slides stained under the same conditions. Then

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Daniel T. Ginat, Sanjay P. Prabhu, and Joseph R. Madsen

C hanges in the appearance of the corpus callosum occur in 5%–17% of cases after successful but sudden ventricular CSF shunting. 1 , 4–6 The alterations in the corpus callosum that appear on imaging can be substantial, as demonstrated in this case report. We propose that the term “postshunting corpus callosum swelling” be used to describe this process, because it occurs in response to decreased pressure that may allow CSF to infiltrate the chronically stressed structure. In this report the DT imaging characteristics of this condition are depicted