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The Etiology of Ring Lesions on Diffusion-Weighted Imaging NeuroRadiol J 27:280-287, Finelli, P. & Foxman, E.B., 2014 See this aricle in Pubmed Article Abstract Thirty-one cases, including 15 new patients, comprise the study group. Immunocompromised patients accounted for 38% of patients with ring lesions on diffusion-weighted imaging with cerebral aspergillosis in five patients, progressive multifocal leukoencephalopathy in three, primary CNS lymphoma in two, cerebral toxoplasmosis in one, and resolving cerebral hematoma in one. In the immunocompetent group demyelinating lesions including multiple sclerosis, acute disseminated encephalomyelitis, Balos concentric sclerosis and acute necrotizing encephalitis, were seen in 11 patients, vascular etiology in four and neoplastic in three patients, two primary and one metastatic and pyogenic brain abscess in one. Ring lesions on diffusion-weighted imaging are associated with a spectrum of disease not previously considered. Immunocompromised patients accounted for almost one-half while demyelinating conditions in the immunocompetent patients were most common overall.

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(click to filter results - removes previous filter) abscess,intracerebral acute necrotizing encephalitis central nervous system,infection of cerebrovascular accident concentric sclerosis immunocompetent immunosuppression intracerebral hemorrhage lymphoma,primary of CNS MRI,abnormal MRI,diffusion weighted MRI,ring sign MRI,ring sign,open multiple sclerosis progressive multifocal leucoencephalopathy toxoplasmosis,CNS

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