Body fat redistribution syndrome
Fat redistribution syndrome in HIV patients on antiretroviral therapy.
Body fat redistribution syndrome, also known as fat derangement, is a type of lipodystrophy where a person loses fat—or, less commonly, gains it—typically in the cheeks or face. This condition is most frequently seen in people with HIV/AIDS who are on antiretroviral therapy.
Lipodystrophy syndromes are a group of disorders, either inherited or acquired, in which the body cannot produce or maintain healthy fat tissue. The medical term for this is abnormal or degenerative changes in the body’s adipose tissue. A more specific term, lipoatrophy, refers to fat loss in a particular area, most often the face. This condition also involves a lack of circulating leptin, which can lead to bone density changes such as osteoporosis. The absence of fat tissue is linked to insulin resistance, high triglyceride levels, non-alcoholic fatty liver disease (NAFLD), and metabolic syndrome.
There are several types of lipodystrophy. Congenital forms include congenital generalized lipodystrophy (Berardinelli-Seip syndrome), familial partial lipodystrophy, and Marfanoid–progeroid–lipodystrophy syndrome. Acquired forms include acquired partial lipodystrophy (Barraquer-Simons syndrome), acquired generalized lipodystrophy, centrifugal abdominal lipodystrophy, lipoatrophia annularis, localized lipodystrophy, HIV-associated lipodystrophy, drug-induced lipodystrophy, and chronic atypical neutrophilic dermatosis with lipodystrophy and elevated temperature syndrome (CANDLE), which is an acquired autoinflammatory disorder.
The condition arises because the subcutaneous tissue cannot store enough fat, so fat gets deposited in non-adipose tissues—a process called lipotoxicity—leading to insulin resistance. Patients often have high triglycerides, severe fatty liver disease, and little or no body fat. The average lifespan is about 30 years, with liver failure being the usual cause of death. Unlike obesity-related NAFLD, leptin levels are very low in lipodystrophy.
Lipodystrophy can also appear as a lump or small dent in the skin from repeatedly injecting medication in the same spot. These types are harmless and can usually be avoided by rotating injection sites. For people with diabetes, using purified insulins and new needles with each injection may help, though rotating sites is not always enough.
- Type
- Acquired lipodystrophy syndrome
- Also known as
- Fat derangement
- Primary cause
- Antiretroviral therapy in HIV/AIDS patients
- Common manifestation
- Fat loss in cheeks or face
- Associated conditions
- HIV/AIDS
Lore & Background
Body fat redistribution (BFR) syndrome is a form of lipodystrophy that manifests as fat loss, or occasionally fat gain, most notably in the cheeks or face. It most often occurs in HIV/AIDS patients undergoing antiretroviral therapy. The condition is part of a broader group of disorders where the body is unable to produce and maintain healthy fat tissue. Notably, while leptin deficiency in lipodystrophy can affect bone metabolism, it is associated with osteoporosis or bone density changes rather than osteosclerosis. Additionally, CANDLE syndrome is classified as an acquired autoinflammatory disorder, not a congenital genetic lipodystrophy.
Reader's Guide
Body fat redistribution syndrome is significant as a common complication of antiretroviral therapy in HIV/AIDS patients, affecting their appearance and quality of life. It is characterized by fat loss in the face and cheeks, though fat gain may also occur. The condition falls under the broader category of lipodystrophy, which includes both congenital and acquired forms. In HIV-associated lipodystrophy, the fat redistribution is often linked to older antiretroviral drugs such as thymidine analogues and nucleoside reverse transcriptase inhibitors like zidovudine and stavudine. Diagnosis is clinical, typically made by an endocrinologist, and may involve skinfold measurements or dual-energy X-ray absorptiometry. Treatment options include leptin replacement therapy with metreleptin for generalized forms, though for BFR specifically, management focuses on addressing the underlying HIV treatment regimen. The condition highlights the long-term side effects of HIV therapy and the need for careful monitoring of fat distribution in patients.
Did You Know?
- Body fat redistribution syndrome is a form of lipodystrophy characterized by fat loss or occasional fat gain, often in the cheeks or face.
- Lipoatrophy, a related term, describes loss of fat from one area, usually the face.
- Some antiretroviral drugs, such as zidovudine and stavudine, are associated with lipoatrophy.
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