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de Medeiros Rimkus C, Fragoso DC, Apóstolos Pereira SL, da Costa Leite C. Atypical Demyelinating Disorders: MR Imaging Features, Atypical Triggers, and Etiopathogenesis. Neuroimaging Clin N Am 2024; 34:421-438. [PMID: 38942525 DOI: 10.1016/j.nic.2024.03.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/30/2024]
Abstract
Atypical demyelinating lesions (ADLs) can be idiopathic, occurring as isolated and self-limited events, or can appear in different stages of relapsing demyelinating diseases. Not infrequently, ADLs occur in inflammatory syndromes associated with exogenous or endogenous toxic factors, metabolic imbalance, or infectious agents. It is important to recognize imaging patterns that indicate an inflammatory/demyelinating substrate in central nervous system lesions and to investigate potential triggers or complicating factors that might be associated. The prognostic and treatment strategies of ADLs are influenced by the underlying etiopathogenesis.
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Affiliation(s)
- Carolina de Medeiros Rimkus
- Department of Radiology and Oncology, Faculdade de Medicina da Universidade de São Paulo, R. Dr. Ovídio Pires de Campos, 75, Cerqueira Cesar, São Paulo-SP, 05403-010, Brazil; Instituto D'Or de Ensino e Pesquisa (IDOR), Av. Brigadeiro Luís Antônio, 5001 - Jardim Paulista, São Paulo - SP - CEP 01401-002; MS Center, Anatomy and Neurosciences, Vrije Universiteit Amsterdam, Amsterdam Neuroscience, Amsterdam UMC, Location VUmc, De Boelelaan, 1117, 1081 HV, Amsterdam, The Netherlands.
| | - Diego Cardoso Fragoso
- Department of Radiology and Oncology, Faculdade de Medicina da Universidade de São Paulo, R. Dr. Ovídio Pires de Campos, 75, Cerqueira Cesar, São Paulo-SP, 05403-010, Brazil; Fleury Group, Av. Morumbi, 8860 - Jardim das Acacias, São Paulo - SP, 04580-060, Brazil
| | - Samira Luisa Apóstolos Pereira
- Department of Neurology, Faculdade de Medicina da Universidade de São Paulo, Av. Dr. Enéas de Carvalho Aguiar, 255 - Sala 5083, 5° andar - Cerqueira César, São Paulo-SP, 05402-000, Brazil
| | - Claudia da Costa Leite
- Department of Radiology and Oncology, Faculdade de Medicina da Universidade de São Paulo, R. Dr. Ovídio Pires de Campos, 75, Cerqueira Cesar, São Paulo-SP, 05403-010, Brazil; Fleury Group, Av. Morumbi, 8860 - Jardim das Acacias, São Paulo - SP, 04580-060, Brazil
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Naidoo A, Paruk H, Bhagwan B, Moodley A. Atypical presentations of acute disseminated encephalomyelitis (ADEM) in HIV infection. J Neurovirol 2016; 23:160-170. [PMID: 27687126 DOI: 10.1007/s13365-016-0481-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2016] [Revised: 08/04/2016] [Accepted: 09/06/2016] [Indexed: 11/25/2022]
Abstract
Acute disseminated encephalomyelitis is a monophasic demyelinating disorder of the central nervous system associated with various viral infections including HIV infection. We present the findings of seven HIV-infected patients with mild to moderate immunosuppression presenting with atypical features. Four patients had a multiphasic course; three patients had tumefactive lesions, and two patients had corpus callosum lesions. Two patients with the multiphasic course also had tumefactive lesions. Their clinical and radiological findings are presented. Despite the few cases, we propose that the dysimmune process lying between marked immunosuppression (CD4 < 200 cells/μL) and normal CD4 counts (CD4 > 500 cells/μL) might be responsible for these atypical presentations.
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Affiliation(s)
- Ansuya Naidoo
- Department of Neurology, Greys Hospital, Pietermaritzburg, South Africa.,Department of Neurology, University of Kwazulu-Natal, Durban, South Africa
| | - Hoosain Paruk
- Department of Neurology, University of Kwazulu-Natal, Durban, South Africa.,Department of Neurology, Inkosi Albert Luthuli Hospital, Durban, South Africa
| | - Bhupendra Bhagwan
- Department of Neurology, University of Kwazulu-Natal, Durban, South Africa
| | - Anand Moodley
- Department of Neurology, Greys Hospital, Pietermaritzburg, South Africa. .,Department of Neurology, University of Kwazulu-Natal, Durban, South Africa.
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Abstract
This chapter will serve as a guide for the diagnosis of multiple sclerosis (MS). Primary aims include a review of both the common and atypical clinical manifestations of MS, a detailed discussion of the alternative diagnoses which can mimic MS, as well as a review of the current established diagnostic criteria and a history of their development. It will also review the distinct disease courses and MS variants. The goal of the chapter is to facilitate the diagnostic process for clinicians so that they may expedite early diagnosis and treatment in an effort to alter disease outcomes and ultimately improve patients' quality of life.
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Affiliation(s)
- Tracy M Deangelis
- Corinne Goldsmith Dickinson Center for Multiple Sclerosis, Mount Sinai Medical Center, New York, NY, USA
| | - Aaron Miller
- Corinne Goldsmith Dickinson Center for Multiple Sclerosis, Mount Sinai Medical Center, New York, NY, USA.
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Gray F, Lescure FX, Adle-Biassette H, Polivka M, Gallien S, Pialoux G, Moulignier A. Encephalitis with infiltration by CD8+ lymphocytes in HIV patients receiving combination antiretroviral treatment. Brain Pathol 2013; 23:525-33. [PMID: 23347174 DOI: 10.1111/bpa.12038] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2012] [Accepted: 01/08/2013] [Indexed: 10/27/2022] Open
Abstract
We report the neuropathological findings in 10 HIV-infected patients treated by combination antiretroviral therapy who developed subacute encephalopathy of rapidly progressive onset. Brain biopsy showed encephalitic lesions variably associated with myelin loss and slight axonal damage. There was inconstant, weak expression of HIV protein p24; tests for other pathogens were negative. The most striking feature was diffuse, perivascular and intraparenchymal infiltration by CD8+ T-lymphocytes. Six patients improved after the treatment. Four had an unfavorable outcome and died within a year. Post-mortem in one case confirmed HIV leukoencephalitis with p24-positive multinucleated giant cells, associated with acute demyelinating encephalomyelitis (ADEM) in the cerebellum. There was diffuse infiltration by CD8+ lymphocytes; CD4+ cells were virtually absent. These cases may represent a specific clinicopathological entity, of which a few comparable cases have been already described. They can be included in the wide framework of immune reconstitution disease. Such syndromes have been described with opportunistic infections, but only seldom with HIV infection of the central nervous system (CNS). Our findings support the hypothesis that CD8+ cytotoxic lymphocytes can be harmful in immune reconstitution disease, particularly in the absence of CD4+ lymphocytes. CD8 cytotoxicity produces an acutization of a smoldering infection and/or an immunopathological reaction similar to ADEM.
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Affiliation(s)
- Françoise Gray
- Service Central d'Anatomie et de Cytologie Pathologiques, AP-HP, Hôpital Lariboisière-Université Paris 7, Paris, France.
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