PMID- 31191548 OWN - NLM STAT- MEDLINE DCOM- 20200616 LR - 20200616 IS - 1664-3224 (Electronic) IS - 1664-3224 (Linking) VI - 10 DP - 2019 TI - Severe Progressive Multifocal Leukoencephalopathy (PML) and Spontaneous Immune Reconstitution Inflammatory Syndrome (IRIS) in an Immunocompetent Patient. PG - 1188 LID - 10.3389/fimmu.2019.01188 [doi] LID - 1188 AB - Background: Progressive multifocal leukoencephalopathy (PML) is an opportunistic infection with JC-virus (JCV), a papova-virus, affecting mostly oligodendrocytes and the white matter of the central nervous system. Progressive Multifocal Leukoencephalopathy (PML) almost exclusively occurs in immunocompromised patients based on different underlying conditions of severe cellular immunodeficiency such as HIV/AIDS, secondary to neoplastic and autoimmune diseases, or during immunosuppressive therapy. Case presentation: We present the case of an otherwise healthy and immunocompetent patient without immunosuppressive therapy who was admitted with hemianopsia to the right side, sensory aphasia and changes of behavior. Magnet resonance imaging (MRI) and laboratory testing confirmed the diagnosis of PML, although functional tests did not show any evidence for cellular immunodeficiency. Extensive immunological tests did not reveal an apparent immunodeficiency. During symptomatic therapy the patient developed seizures which were assumed to be caused by a spontaneous immune reconstitution inflammatory syndrome (IRIS) demonstrated by MRI. We added a high dose of intravenous corticosteroids to the antiepileptic treatment and seizures ended shortly thereafter. However, the impairments of vision, behavior and language persisted. Conclusions: Our case report highlights that an apparently immunocompetent patient can develop PML and IRIS spontaneously. Therefore, MRI should be applied immediately whenever a rapid progression of PML symptoms occurs as treatment of IRIS with corticosteroids can result in a marked clinical improvement. FAU - Krey, Lea AU - Krey L AD - Department of Neurology, Hannover Medical School, Hanover, Germany. FAU - Raab, Peter AU - Raab P AD - Hannover Medical School, Institute of Neuroradiology, Hanover, Germany. FAU - Sherzay, Romilda AU - Sherzay R AD - Department of Nuclear Medicine, Hannover Medical School, Hanover, Germany. FAU - Berding, Georg AU - Berding G AD - Department of Nuclear Medicine, Hannover Medical School, Hanover, Germany. FAU - Stoll, Matthias AU - Stoll M AD - Clinic for Immunology and Rheumatology, Unit for Infectious Diseases, Hannover Medical School, Hanover, Germany. FAU - Stangel, Martin AU - Stangel M AD - Department of Neurology, Hannover Medical School, Hanover, Germany. FAU - Wegner, Florian AU - Wegner F AD - Department of Neurology, Hannover Medical School, Hanover, Germany. LA - eng PT - Case Reports DEP - 20190528 PL - Switzerland TA - Front Immunol JT - Frontiers in immunology JID - 101560960 SB - IM MH - Aged MH - Brain/diagnostic imaging/pathology MH - Humans MH - Immune Reconstitution Inflammatory Syndrome/*diagnosis/etiology/therapy MH - *Immunocompromised Host MH - JC Virus/genetics MH - Leukoencephalopathy, Progressive Multifocal/*diagnosis/etiology/therapy MH - Magnetic Resonance Imaging MH - Male MH - Polymerase Chain Reaction MH - Positron-Emission Tomography MH - Serologic Tests PMC - PMC6546850 OTO - NOTNLM OT - JC-virus OT - corticosteroid OT - immunocompetence OT - progressive multifocal leukoencephalopathy (PML) OT - spontaneous immune reconstitution inflammatory syndrome (IRIS) EDAT- 2019/06/14 06:00 MHDA- 2020/06/17 06:00 PMCR- 2019/01/01 CRDT- 2019/06/14 06:00 PHST- 2019/03/08 00:00 [received] PHST- 2019/05/10 00:00 [accepted] PHST- 2019/06/14 06:00 [entrez] PHST- 2019/06/14 06:00 [pubmed] PHST- 2020/06/17 06:00 [medline] PHST- 2019/01/01 00:00 [pmc-release] AID - 10.3389/fimmu.2019.01188 [doi] PST - epublish SO - Front Immunol. 2019 May 28;10:1188. doi: 10.3389/fimmu.2019.01188. eCollection 2019.