PMID- 33235734 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20220418 IS - 2050-0068 (Print) IS - 2050-0068 (Electronic) IS - 2050-0068 (Linking) VI - 9 IP - 11 DP - 2020 TI - Standard treatment-refractory cytomegalovirus encephalitis unmasked by immune reconstitution inflammatory syndrome and successfully treated with virus-specific hyperimmune globulin. PG - e1201 LID - 10.1002/cti2.1201 [doi] LID - e1201 AB - OBJECTIVES: Cytomegalovirus (CMV)-related encephalitis is a rare but potentially life-threatening complication of CMV infection in immunocompromised patients. The high mortality rate is associated with deficient immune system reconstitution after hematopoietic stem cell transplant (HSCT) and poor bioavailability of antiviral drugs in cerebrospinal fluid (CSF). CMV-related central nervous system (CNS) infection may occur with aspecific symptoms, without evidence of either blood viral load or magnetic resonance imaging (MRI) signs of encephalitis. METHODS: Here, we describe a 10-year-old girl who underwent an allogeneic HSCT and subsequently developed CMV encephalitis. Because of the absence of CMV antigen in the blood, the diagnosis of encephalitis was proposed only after a delay, following the onset of immune reconstitution inflammatory syndrome (IRIS). Two months of combined dual antiviral therapy with ganciclovir and foscarnet proved ineffective against CMV and caused significant bone marrow and renal toxicity. To avoid further toxicity, the girl was given daily treatment with CMV-hyperimmune globulins alone. RESULTS: After three weeks, the CSF viral load dropped significantly and was undetectable within three more weeks. In the meantime, the renal impairment resolved, and there was a complete bone marrow recovery. CONCLUSION: We suggest that this patient succeeded in achieving CMV CSF clearance with high dose of CMV-hyperimmune globulin, given alone, because of the ability of immunoglobulins to penetrate the blood-brain barrier (BBB). CI - (c) 2020 The Authors. Clinical & Translational Immunology published by John Wiley & Sons Australia, Ltd on behalf of Australian and New Zealand Society for Immunology, Inc. FAU - Maximova, Natalia AU - Maximova N AUID- ORCID: 0000-0003-0934-1875 AD - Institute for Maternal and Child Health - IRCCS Burlo Garofolo Trieste Italy. FAU - Marcuzzi, Annalisa AU - Marcuzzi A AD - University of Ferrara Ferrara Italy. FAU - Del Rizzo, Irene AU - Del Rizzo I AD - University of Trieste Trieste Italy. FAU - Zanon, Davide AU - Zanon D AD - Institute for Maternal and Child Health - IRCCS Burlo Garofolo Trieste Italy. FAU - Maestro, Alessandra AU - Maestro A AD - Institute for Maternal and Child Health - IRCCS Burlo Garofolo Trieste Italy. FAU - Barbi, Egidio AU - Barbi E AD - Institute for Maternal and Child Health - IRCCS Burlo Garofolo Trieste Italy. AD - University of Trieste Trieste Italy. FAU - Sala, Roberto AU - Sala R AD - University of Parma Parma Italy. LA - eng PT - Case Reports DEP - 20201117 PL - Australia TA - Clin Transl Immunology JT - Clinical & translational immunology JID - 101638268 PMC - PMC7670254 OTO - NOTNLM OT - CMV-hyperimmune globulin OT - IL-6 OT - cerebrospinal fluid CMV antibodies OT - cytomegalovirus (CMV)-related encephalitis OT - immune reconstitution inflammatory syndrome (IRIS) COIS- The authors have declared that no conflict of interest exists. EDAT- 2020/11/26 06:00 MHDA- 2020/11/26 06:01 PMCR- 2020/11/17 CRDT- 2020/11/25 05:46 PHST- 2020/05/18 00:00 [received] PHST- 2020/09/23 00:00 [revised] PHST- 2020/08/09 00:00 [revised] PHST- 2020/10/02 00:00 [accepted] PHST- 2020/11/25 05:46 [entrez] PHST- 2020/11/26 06:00 [pubmed] PHST- 2020/11/26 06:01 [medline] PHST- 2020/11/17 00:00 [pmc-release] AID - CTI21201 [pii] AID - 10.1002/cti2.1201 [doi] PST - epublish SO - Clin Transl Immunology. 2020 Nov 17;9(11):e1201. doi: 10.1002/cti2.1201. eCollection 2020.