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| AIDS-Related Complex ARC | Lymphadenopathy Syndrome | AIDS Related Complex | Complex, AIDS-Related | Lymphadenopathy Syndromes | Syndrome, Lymphadenopathy | Syndromes, Lymphadenopathy A prodromal phase of infection with the human immunodeficiency virus (HIV). Laboratory criteria separating AIDS-related complex (ARC) from AIDS include elevated or hyperactive B-cell humoral immune responses, compared to depressed or normal antibody reactivity in AIDS; follicular or mixed hyperplasia in ARC lymph nodes, leading to lymphocyte degeneration and depletion more typical of AIDS; evolving succession of histopathological lesions such as localization of Kaposi's sarcoma, signaling the transition to the full-blown AIDS. |