Supplementary Material for: Malaria as Potential Etiology and Treatment Complicating Factor in DLBCL Patient: a Case Report

Malaria is known to be a significant risk factor and also a potential complicating factor during the treatment of lymphoid malignancy. There has not been a reported case of malaria reactivation that occurred weeks after cytotoxic chemotherapy completion, especially in non-endemic regions. Our patient was a 47-year-old man with a history of repeated falciparum malaria infection experiencing two months of progressive unilateral nasal blockage and recurrent anterior epistaxis, which was diagnosed as diffuse large B-cell lymphoma (DLBCL) through pathological examination. He was treated with six cycles of classical R-CHOP, resulting in complete remission. One month after remission, he experienced shivering, fever, sweating, and a return to normal temperature, which repeated irregularly for roughly one week. His laboratory result showed anemia, leukopenia and profound thrombocytopenia. Immunochromatographic testing (ICT) confirmed the diagnosis of falciparum malaria. This case was considered a relapse since our centre is not in the malaria-endemic region. He was cured with a combination of dihydroartemisinin-piperaquine and primaquine. Our case demonstrated the duality of malaria as potential etiology and treatment complicating factor in DLBCL.