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Esam-Rajab Mahroug,1 Candice Sher-Locketz,1 Minodora-Silvia Desmirean,2,3 Emmanuel-Akinola Abayomi,1,4 Ciprian Tomuleasa,3,5,6 Ravnit Grewal1,7 1Division of Haematology, Department of Pathology, University of Stellenbosch, Tygerberg Academic Hospital, Cape Town, South Africa; 2Department of Pathology, Military Hospital of Cluj Napoca, Cluj Napoca, Romania; 3Department of Hematology, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj Napoca, Romania; 4Department of Hematology, Nigeria Institute for Medical Research, Lagos, Nigeria; 5Research Center for Functional Genomics and Translational Medicine, Iuliu Hatieganu University of Medicine and Pharmacy, Cluj Napoca, Romania; 6Department of Hematology, Ion Chiricuta Clinical Research Center, Cluj Napoca, Romania; 7Department of Pathology, South African Bioinformatics Institute, University of The Western Cape, Bellville, South Africa Introduction: Castleman’s disease (CD), first described by Benjamin Castleman in 1954, is a giant or angiofollicular lymph node hyperplasia, described as a rare monotypic polyclonal B-cell lymphoproliferative disorder with an incompletely understood pathogenesis and variable clinical behavior. This study aimed to determine the incidence of CD diagnosis over an 11-year period. Additionally, the study aimed to describe the demographic, laboratory, and pathological features of CD. Methods: This is a retrospective study where the demographic and laboratory data were retrieved from the Tygerberg Academic Hospital (TAH) patient electronic records and Tygerberg Lymphoma Study Group (TLSG) and statistical analysis performed on the patients diagnosed with CD. Results: Fifty-four patients were diagnosed with CD during this period. The median age at presentation was 39 years (range: 9–58). HIV serology was available in 53 patients, of which 51 were HIV-positive and two were HIV-negative. The history of initiation of antiretroviral therapy at diagnosis was available in 43 patients (38 on treatment, four were not on treatment, and one defaulted treatment). The median CD4 count was 232.50 cells/μL (range: 2–883). The HIV viral load was performed in 43 patients at diagnosis, which was