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    Kaposi’s sarcoma

    Kaposi's sarcoma is a cancerous tumor of the connective tissue, and is often associated with AIDS.

    Causes

    Before the AIDS epidemic, Kaposi's sarcoma was seen mainly in elderly Italian and Jewish men, and rarely, in elderly women. Among this group, the tumors developed slowly. In AIDS patients, the cancer can develop quickly. The cancer may also involve the skin, lungs, gastrointestinal tract, and other organs.

    In people with AIDS, Kaposi's sarcoma is caused by an interaction between HIV, a weakened immune system, and the human herpesvirus-8 (HHV-8). Kaposi's sarcoma has been linked to the spread of HIV and HHV-8 through sexual activity.

    People who have kidney or other organ transplants are also at risk for Kaposi's sarcoma.

    African Kaposi's sarcoma is fairly common in young adult males living near the equator. One form is also common in young African children.

    Symptoms

    The tumors most often appear as bluish-red or purple bumps on the skin. They are reddish-purple because they are rich in blood vessels.

    The lesions may first appear on the feet or ankles, thighs, arms, hands, face, or any other part of the body. They also can appear on sites inside the body.

    Other symptoms may include:

    • Bloody sputum
    • Shortness of breath

    Exams and Tests

    The following tests may be performed to diagnose Kaposi's sarcoma:

    • Bronchoscopy
    • CT scan
    • Endoscopy
    • Skin biopsy

    Treatment

    How this condition is treated depends on:

    • How much the immune system is suppressed (immunosuppression)
    • Number and location of the tumors
    • Symptoms

    Treatments include:

    • Antiviral therapy againstHIV
    • Combination chemotherapy
    • Freezing (cryotherapy)
    • Radiation therapy

    Lesions may return after treatment.

    Outlook (Prognosis)

    Treating Kaposi's sarcoma does not improve the chances of survival from AIDS itself. The outlook depends on the person's immune status and how much of the HIV virus is in the patient's blood (viral load).

    Possible Complications

    Complications can include:

    • Cough (possibly bloody) and shortness of breath if the disease is in the lungs
    • Leg swelling that may be painful or cause infections if the disease is in the lymph nodes of the legs

    The tumors can return even after treatment. Kaposi's sarcoma can be deadly for a person with AIDS.

    An aggressive form of African Kaposi's sarcoma can spread quickly to the bones. Another form found in African children does not affect the skin. Instead, it spreads through the lymph nodes and vital organs, and can quickly become deadly.

    Prevention

    Safe sexual practices can prevent HIV infection. This prevents AIDS and its complications, including Kaposi's sarcoma.

    References

    Kaye KM. Kaposi’s sarcoma-associated herpesvirus (human herpesvirus type 8). In: Mandell GL, Bennett JE, Dolin R, eds. Principles and Practice of Infectious Diseases. 7th ed. Philadelphia, Pa: Elsevier Churchill Livingstone; 2009:chap 141.

    Volberding PA. Hematology and oncology in patients with human immunodeficiency virus infection. In: Goldman L, Schafer AI, eds. Cecil Medicine. 24th ed. Philadelphia, Pa: Saunders Elsevier; 2011:chap 400.

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      Tests for Kaposi’s sarcoma

        Review Date: 10/6/2012

        Reviewed By: David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine. Jatin M. Vyas, MD, PhD, Assistant Professor in Medicine, Harvard Medical School; Assistant in Medicine, Division of Infectious Disease, Department of Medicine, Massachusetts General Hospital. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M. Health Solutions, Ebix, Inc.

        The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.
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