PMID- 27056866 OWN - NLM STAT- MEDLINE DCOM- 20160725 LR - 20160408 IS - 1881-6096 (Print) IS - 1881-6096 (Linking) VI - 68 IP - 4 DP - 2016 Apr TI - [Progressive Multifocal Leukoencephalopathy with Inflammatory Reactions]. PG - 479-88 LID - 10.11477/mf.1416200422 [doi] AB - Progressive multifocal leukoencephalopathy (PML) is a demyelinating disorder caused by reactivation of the JC virus associated with impaired host immunity. However, PML may occur even without an evident cause of immunosuppression. In such cases, JC virus DNA in cerebrospinal fluid (CSF) may not be detectable with polymerase chain reactions (PCR), and a brain biopsy may be performed. Pathology may exhibit marked inflammatory reactions around the JC virus-infected cells, although typical intranuclear viral inclusions would rarely be seen. Atypical inflammation in patients with PML likely an indication of the host's immune-response against the virus. this is usually observed in those with relatively-mild immunosuppression with favorable prognosis. Here, we describe cases of PML that exhibited inflammatory reactions; a recent topic, PML with immune reconstruction inflammatory syndrome (IRIS), will also be discussed. FAU - Shishido-Hara, Yukiko AU - Shishido-Hara Y AD - Physician, Student, Researcher Support Center/Department of Anatomic Pathology, Tokyo Medical University. FAU - Uchihara, Toshiki AU - Uchihara T FAU - Sanjo, Nobuo AU - Sanjo N LA - jpn PT - English Abstract PT - Journal Article PL - Japan TA - Brain Nerve JT - Brain and nerve = Shinkei kenkyu no shinpo JID - 101299709 SB - IM MH - AIDS-Related Opportunistic Infections/complications/diagnosis/*pathology MH - Biopsy/methods MH - Brain/*pathology MH - Demyelinating Diseases/complications/diagnosis/*pathology MH - Humans MH - Inflammation/complications/diagnosis/pathology MH - Leukoencephalopathy, Progressive Multifocal/complications/diagnosis/*pathology EDAT- 2016/04/09 06:00 MHDA- 2016/07/28 06:00 CRDT- 2016/04/09 06:00 PHST- 2016/04/09 06:00 [entrez] PHST- 2016/04/09 06:00 [pubmed] PHST- 2016/07/28 06:00 [medline] AID - 1416200422 [pii] AID - 10.11477/mf.1416200422 [doi] PST - ppublish SO - Brain Nerve. 2016 Apr;68(4):479-88. doi: 10.11477/mf.1416200422.