AIDS Related Complex

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.