Journal of neuroimaging : official journal of the American Society of Neuroimaging
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To evaluate magnetic resonance imaging (MRI) features of ruptured spinal dermoid tumors with spread of lipid droplets in the central spinal canal and/or spinal subarachnoid space and to understand the underlying mechanism. ⋯ Spinal dermoid tumors ruptured into central spinal canal and/or spinal subarachnoid space have unique MRI features. The absorption of lipid droplets within central spinal canal is rather difficult, and their movement is extremely slow. We propose that fatty components within the central canal of spinal cord may be partially associated with spinal dermoid tumors developmentally.
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Review Case Reports
Ectopic pituitary adenoma associated with an empty sella: a case report and review of the literature.
A case of ectopic pituitary adenoma in the sphenoid sinus associated with an empty sella is reported. The coexistence of an ectopic pituitary adenoma and an empty sella is quite rare. ⋯ In the present case, the hypointense line that coated the pituitary gland was clearly demonstrated on 3-tesla T2-weighted magnetic resonance imaging. The hypointense line is considered to be the pituitary capsule and was critical in diagnosing this rare entity.
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Lesion studies (both patients and nonhuman animals) and functional neuroimaging studies of normal, healthy subjects provide complementary, but different types of information. This article suggests that both study types are necessary for deriving inferentially sound conclusions regarding the neural basis of cognition.
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Comparative Study
Variability in diagnosing Creutzfeldt-Jakob disease using standard and proposed diagnostic criteria.
Creutzfeldt-Jakob disease (CJD) is a rapidly progressive dementia with a median survival of 2-14 months. The diagnosis can only be made accurately by biopsy/autopsy. However, this is not always feasible or desirable. Thus, diagnostic criteria have been proposed by UCSF, European MRI-CJD Consortium, and WHO. We will compare these criteria. ⋯ This study illustrates the variability in diagnosing CJD and emphasizes the diagnostic utility of neuroimaging. It also highlights false-positives that occur with neuroimaging.
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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.