AIDS-related complex (ARC) was introduced after discovery of the HIV (
human immunodeficiency virus
The human immunodeficiency viruses (HIV) are two species of ''Lentivirus'' (a subgroup of retrovirus) that infect humans. Over time, they cause acquired immunodeficiency syndrome (AIDS), a condition in which progressive failure of the immun ...
) when the medical community became aware of the inherent difficulties associated with treating patients who have an advanced case of HIV which gave rise to the term
acquired immune deficiency syndrome
Human immunodeficiency virus infection and acquired immunodeficiency syndrome (HIV/AIDS) is a spectrum of conditions caused by infection with the human immunodeficiency virus (HIV), a retrovirus. Following initial infection an individual m ...
(AIDS). The necessity for doctors to quickly and accurately understand the specific needs of unknown patients with AIDS in an
emergency department situation was addressed with the creation of the term ARC.
ARC is a "
prodromal
In medicine, a prodrome is an early sign or symptom (or set of signs and symptoms) that often indicates the onset of a disease before more diagnostically specific signs and symptoms develop. It is derived from the Greek word ''prodromos'', meaning ...
phase of infection with the human immunodeficiency virus (HIV)" that includes: low grade
fever
Fever, also referred to as pyrexia, is defined as having a temperature above the normal range due to an increase in the body's temperature set point. There is not a single agreed-upon upper limit for normal temperature with sources using val ...
, unexplained weight loss,
diarrhea
Diarrhea, also spelled diarrhoea, is the condition of having at least three loose, liquid, or watery bowel movements each day. It often lasts for a few days and can result in dehydration due to fluid loss. Signs of dehydration often begin ...
,
opportunistic infection
An opportunistic infection is an infection caused by pathogens (bacteria, fungi, parasites or viruses) that take advantage of an opportunity not normally available. These opportunities can stem from a variety of sources, such as a weakened immun ...
s and
generalized lymphadenopathy.
"Laboratory criteria separating AIDS-related complex (ARC) from AIDS include elevated or hyperactive
B-cell
B cells, also known as B lymphocytes, are a type of white blood cell of the lymphocyte subtype. They function in the humoral immunity component of the adaptive immune system. B cells produce antibody molecules which may be either secreted ...
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
Kaposi's sarcoma (KS) is a type of cancer that can form masses in the skin, in lymph nodes, in the mouth, or in other organs. The skin lesions are usually painless, purple and may be flat or raised. Lesions can occur singly, multiply in a limit ...
, signaling the transition to the full-blown AIDS."
As listed by the National Library of Medicine under Medical Subject Headings
/ref>
Clinical use of this term was widely discontinued by the year 2000 in the United States after having been replaced by modern laboratory criteria.
References
External links
HIV/AIDS
{{infectious-disease-stub