PMID- 38496135 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20240319 IS - 2168-8184 (Print) IS - 2168-8184 (Electronic) IS - 2168-8184 (Linking) VI - 16 IP - 2 DP - 2024 Feb TI - Hemophagocytic Lymphohistiocytosis Associated With Human Herpesvirus-6 (HHV-6) Infection in an Immunocompetent Adult: A Case Report. PG - e54299 LID - 10.7759/cureus.54299 [doi] LID - e54299 AB - Hemophagocytic lymphohistiocytosis (HLH) is a rare disorder characterized by extreme immune activation and excessive inflammation. It has been reported in patients with familial cases, immunodeficiencies, malignancies, stem cell transplants, and viral etiologies. This report describes acquired HLH associated with Human herpesvirus-6 (HHV-6) infection in a 76-year-old previously healthy male. The patient was admitted to the hospital due to fever, chills, and abdominal pain. The diagnostic workup revealed gallbladder wall thickening on imaging, concerning for cholecystitis. The patient was started on treatment for sepsis. Further clinical deterioration led to an extensive infectious workup. The patient was found to have elevated soluble IL-2Ra levels, and a bone marrow biopsy was performed, which revealed HLH. A positive HHV-6 polymerase chain reaction in the cerebrospinal fluid and serum confirmed the viral infection. Treatment involved the initiation of high-dose steroids, etoposide, and ganciclovir. Despite these interventions, the patient's clinical status worsened, leading to the implementation of comfort measures, and the patient eventually died. This case underscores the importance of considering HHV-6 as a potential cause of HLH in immunocompetent adults. From this case, we infer that a heightened level of vigilance is necessary to recognize and intervene in this challenging condition promptly. CI - Copyright (c) 2024, Rahman et al. FAU - Rahman, Ateeb Ur AU - Rahman AU AD - Department of Internal Medicine, Penn State Health, Camp Hill, USA. FAU - Baig, Fahad AU - Baig F AD - Department of Medicine, Rashid Latif Medical College, Lahore, PAK. FAU - Javid Chaudhary, Umar Iqbal AU - Javid Chaudhary UI AD - Department of Medicine, Arif Memorial Teaching Hospital, Rashid Latif Medical College, Lahore, PAK. FAU - Ashraf, Muhammad Bilal AU - Ashraf MB AD - Department of Community Medicine, Rashid Latif Medical College, Lahore, PAK. FAU - Jawaid, Muhammad Daim AU - Jawaid MD AD - Department of Medicine, Rashid Latif Medical College, Lahore, PAK. FAU - Chaudary, Amna AU - Chaudary A AD - Department of Internal Medicine, Penn State Health, Camp Hill, PAK. FAU - Tariq, Munim AU - Tariq M AD - Department of Internal Medicine, The Rotherham NHS Foundation Trust, Sheffield, GBR. LA - eng PT - Case Reports DEP - 20240216 PL - United States TA - Cureus JT - Cureus JID - 101596737 PMC - PMC10944635 OTO - NOTNLM OT - cytokine release storm OT - hemophagocytic lymphohistiocytosis (hlh) OT - human herpes virus type 6 OT - hyperferritinemia OT - secondary hemophagocytic lymphohistiocytosis (hlh) COIS- The authors have declared that no competing interests exist. EDAT- 2024/03/18 06:42 MHDA- 2024/03/18 06:43 PMCR- 2024/02/16 CRDT- 2024/03/18 04:32 PHST- 2024/02/16 00:00 [accepted] PHST- 2024/03/18 06:43 [medline] PHST- 2024/03/18 06:42 [pubmed] PHST- 2024/03/18 04:32 [entrez] PHST- 2024/02/16 00:00 [pmc-release] AID - 10.7759/cureus.54299 [doi] PST - epublish SO - Cureus. 2024 Feb 16;16(2):e54299. doi: 10.7759/cureus.54299. eCollection 2024 Feb.