Journal of neuroimaging : official journal of the American Society of Neuroimaging
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Hippocampus is selectively susceptible to ischemic damage and it could be, in some conditions, considered as a border zone of brain ischemia. ⋯ The hypoperfusion induced by a cardiac arrest or an internal carotid dissection with an incomplete circle of Willis promotes hippocampal ischemia in the territories of the anterior choroidal artery and the longitudinal terminal segments of the hippocampal arteries.
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Traumatic intracranial aneurysms are rare lesions, accounting for less than 1% of all intracranial aneurysms. Formation of these lesions after a penetrating missile wound is very unusual, and diagnosis can be difficult due to the presence of associated lesions. In this article, we report a case of a woman who developed a middle cerebral artery aneurysm after a gunshot wound, and discuss potential pitfalls found during diagnostic work-up.
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Case Reports
Juvenile psammomatoid ossifying fibroma with visual disturbance: a case report with imaging features.
Juvenile psammomatoid ossifying fibroma (JPOF) of the sphenoid sinus is a rare subtype of ossifying fibroma of the sinonasal cavity and facial bone in young adults. Computed tomographic (CT) and magnetic resonance (MR) imaging features of JPOF have been reported, but to our knowledge, positron emission tomography (PET) findings have not been described. ⋯ MR imaging showed low signal intensity in the mass on both T(1)- and T(2)-weighted images. [(18)F]fluorodeoxyglucose ([(18)F]FDG) and [(11)C]methyl-L-methionine ([(11)C]Met) PET/CT showed abnormal uptake in the lesion, with standardized uptake values (SUV) of 6.2 ([(18)F]FDG) and 4.6 ([(11)C]Met). Familiarity with the imaging features of this rare disease aids its differentiation from other more familiar lesions to permit appropriately aggressive therapy and improve prognosis.
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High-level gait disorder (HLGD) is a debilitating disorder causing mobility decline in the elderly. Although its clinical characteristics are well described, its anatomical and pathophysiological underpinnings are poorly understood. This study examined the anatomical distribution of white matter (WM) changes in patients with mild to moderate HLGD of the cautious/disequilibrium type, using advanced magnetic resonance imaging (MRI) methods. ⋯ The anatomical distribution associated with HLGD of the cautious/disequilibrium type involves WM pathways that convey motor-related, cognitive and affective-related functions. The underlying pathological process leading to these changes most probably includes demyelination.
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Cerebral coenurosis due to Taenia multiceps is a rare infection with no case reports from India. A 55-year-old male patient had presented with progressive symptoms of hemiparesis of 1-year duration. Magnetic resonance imaging (MRI) with magnetic resonance spectroscopy (MRS) of the lesion was performed that showed a septated cystic lesion in left parieto-occipital lobe. ⋯ MRS showed mildly elevated choline (Cho), depressed creatine (Cr), and N-acetyl aspartate (NAA), a large peak of lactate, pyruvate, and acetate peaks. To best of our knowledge, there has been no reported case of in vivo proton MRS finding ever reported. We present MRS findings in this operatively proven case of T. multiceps cyst of the brain.