Lipodystrophy and HIV
Lipodystrophy is a problem with the way the body produces, uses, and stores fat. It is also called fat redistribution. Since the widespread use of antiretroviral therapy began, the numbers of HIV-positive people with lipodystrophy has increased. Today, lipodystrophy occurs in 30% to 50% of people who are infected with HIV (human immunodeficiency virus).
Symptoms of Lipodystrophy
There are two types of lipodystrophy: fat loss and fat buildup. Men tend to lose fat. Women tend to build up fat.
Fat loss (lipoatrophy) occurs in certain areas of the body:
- Arms and legs (veins tend to show up more)
- Face (sunken cheeks, temples, or eyes)
Fat buildup (lipohypertrophy, lipoaccumulation, or hyperadiposity) is when fat accumulates in certain areas of the body:
- Abdomen (central obesity)
- Breasts (occurs in both men and women)
- Back of neck and shoulders (sometimes called a "buffalo hump")
- Fatty growths in different parts of the body (called lipomas)
Causes of Lipodystrophy
These are possible causes of lipodystrophy:
- Antiretroviral therapy. There are conflicting ideas about this. The older protease inhibitors (PIs) and nucleoside reverse transcriptase inhibitors (NRTIs) have been implicated in causing lipodystrophy. It is less common in the newer medications. The longer you take these drugs, the greater your risk appears to be. Older NRTIs linked to fat loss is Zerit (stavudine, d4T) and Retrovir (zidovudine, AZT).
- HIV. HIV itself may interfere with the way the body processes fat. More severe and lengthier HIV disease may increase the risk.
It's important to be aware that fat loss can also be due to AIDS wasting syndrome.
Other risk factors for lipodystrophy include:
- Being older
- Being white
- Being obese or having significant changes in weight
A physical exam may be all that is needed to diagnose lipodystrophy. Your doctor may measure around your arms, thighs, waist, hips, and neck. Then your doctor can compare these measurements with future measurements to note changes.
It's common to have other metabolic disorders along with lipodystrophy. These disorders may include high cholesterol or insulin resistance. Insulin resistance is a condition that can lead to diabetes. These disorders can also increase your risk for other problems such as heart disease.
For these reasons, your doctor may request lab tests to detect:
- Increased triglyceride (a blood fat) levels
- Increased LDL (bad cholesterol) levels
- Decreased HDL (good cholesterol) levels
- Elevated blood sugar level
- High blood pressure