<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE article PUBLIC "-//NLM//DTD JATS (Z39.96) Journal Publishing DTD v1.2d1 20170631//EN" "JATS-journalpublishing1.dtd"> <ArticleSet> <Article> <Journal> <PublisherName>jmedicalcasereports</PublisherName> <JournalTitle>Frontiers in Medical Case Reports</JournalTitle> <PISSN>I</PISSN> <EISSN>S</EISSN> <Volume-Issue>Volume 2; Issue 6</Volume-Issue> <PartNumber/> <IssueTopic>Multidisciplinary</IssueTopic> <IssueLanguage>English</IssueLanguage> <Season>(Nov-Dec, 2021)</Season> <SpecialIssue>N</SpecialIssue> <SupplementaryIssue>N</SupplementaryIssue> <IssueOA>Y</IssueOA> <PubDate> <Year>-0001</Year> <Month>11</Month> <Day>30</Day> </PubDate> <ArticleType>Medical Case Reports</ArticleType> <ArticleTitle>Hepatitis B Virus Reactivation Under Treatment with Ibrutinib, A Known and Still Dangerous Entity: A Clinical Case Description</ArticleTitle> <SubTitle/> <ArticleLanguage>English</ArticleLanguage> <ArticleOA>Y</ArticleOA> <FirstPage>1</FirstPage> <LastPage>5</LastPage> <AuthorList> <Author> <FirstName>Justine</FirstName> <LastName>Adnet</LastName> <AuthorLanguage>English</AuthorLanguage> <Affiliation/> <CorrespondingAuthor>N</CorrespondingAuthor> <ORCID/> <FirstName>Emilie</FirstName> <LastName>Reboursiere</LastName> <AuthorLanguage>English</AuthorLanguage> <Affiliation/> <CorrespondingAuthor>Y</CorrespondingAuthor> <ORCID/> <FirstName>Bertille</FirstName> <LastName>Comoz</LastName> <AuthorLanguage>English</AuthorLanguage> <Affiliation/> <CorrespondingAuthor>Y</CorrespondingAuthor> <ORCID/> <FirstName>Louise</FirstName> <LastName>Lebedel</LastName> <AuthorLanguage>English</AuthorLanguage> <Affiliation/> <CorrespondingAuthor>Y</CorrespondingAuthor> <ORCID/> <FirstName>Charlotte</FirstName> <LastName>Orhan</LastName> <AuthorLanguage>English</AuthorLanguage> <Affiliation/> <CorrespondingAuthor>Y</CorrespondingAuthor> <ORCID/> <FirstName>Astrid</FirstName> <LastName>Vabret</LastName> <AuthorLanguage>English</AuthorLanguage> <Affiliation/> <CorrespondingAuthor>Y</CorrespondingAuthor> <ORCID/> <FirstName>Isabelle</FirstName> <LastName>Ollivier-Hourmand</LastName> <AuthorLanguage>English</AuthorLanguage> <Affiliation/> <CorrespondingAuthor>Y</CorrespondingAuthor> <ORCID/> <FirstName>Julia</FirstName> <LastName>Dina</LastName> <AuthorLanguage>English</AuthorLanguage> <Affiliation/> <CorrespondingAuthor>Y</CorrespondingAuthor> <ORCID/> </Author> </AuthorList> <DOI/> <Abstract>During therapies for hematologic malignancies, hepatitis B virus (HBV) reactivation is a frequently reported event. Ibrutinib is a drug prescribed, since a few years, for the treatment of hematologic disease, which inhibit Bruton tyrosin kinase and is metabolized in the liver. Contrary to others molecules, there are no guidelines concerning antiviral systematic prophylaxis against HBV reactivation. Here, we describe a lethal case of hepatitis B reactivation in a patient under Ibrutinib treatment. The purpose of this case report is to emphasize the importance of strict monitoring of serological and molecular markers of hepatitis B in patients treated by Ibrutinib and to draw attention to the delicate interpretation of virological results with the risk of false negative HBsAg detection in the context of a high and brutal increase of the virus replication by hook-effect.</Abstract> <AbstractLanguage>English</AbstractLanguage> <Keywords>Hepatitis B Virus (HBV),Reactivation,Ibrutinib,Immunosuppressed Patient</Keywords> <URLs> <Abstract>https://jmedicalcasereports.org/ubijournal-v1copy/journals/abstract.php?article_id=13467&title=Hepatitis B Virus Reactivation Under Treatment with Ibrutinib, A Known and Still Dangerous Entity: A Clinical Case Description</Abstract> </URLs> <References> <ReferencesarticleTitle>References</ReferencesarticleTitle> <ReferencesfirstPage>16</ReferencesfirstPage> <ReferenceslastPage>19</ReferenceslastPage> <References>“EASL 2017 (European Association for The Study of The Liver). 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