Fever of Unknown Origin, Wasting Syndrome and Bone Marrow Involvement: A Leprosy Case Report.

, the etiologic agent of leprosy, is an acid-fast-staining and slow-growing bacilli that infect macrophages and Schwann cells individually or through forming globi. The clinical presentation of leprosy is broad and depends on the host immune response. We report a case of a 42-year-old Brazilian man presenting with fever of unknown origin (FUO), anemia, wasting syndrome, and neuropathy.

Type 2 leprosy reaction presenting as a monoarthritis post multidrug therapy.

Type 2 leprosy reaction, or (ENL), involves a complex interaction between the host's immune system and . It may occur before, during, or after treatment and have a variable clinical presentation involving different body systems, such as skin, osteoarticular, kidneys, and others. Thus, the differential diagnosis, depending on its clinical presentation, can be broad and challenging.