Endemic Kaposi's sarcoma (KS) is a clinically and epidemiologically distinct human immunodeficiency virus negative form of KS occurring in Africa. Kaposi's sarcoma is now the most frequently reported cancer in some areas of Africa.
To determine if a KS-associated herpes-virus (KSHV) is present in both endemic HIV-seronegative and HIV-seropositive KS lesions from African patients.
Paraffin-embedded tissue specimens from Ugandan patients with KS and non-KS tumor control patients attending a university-based oncology clinic were examined in a blinded case-control study. Tissue DNA specimens were examined for detectable KSHV genome by nested polymerase chain reaction performed at two independent laboratories.
We identified KSHV in 17 (85%) of 20 KS tissue specimens from HIV-seronegative patients and 22 (92%) of 24 KS tissue specimens from HIV-infected persons. Kaposi's sarcoma lesions from four HIV-infected persons and four HIV-seronegative persons were positive for KSHV. Unlike previous studies in North America and Europe, three (14%) of 22 non-KS cancer control patients' tissue specimens were also positive for KSHV that resulted in an overall odds ratio of 49.2 (95% confidence interval, 9.1 to 335) for detecting KSHV in KS lesions from patients in Uganda.
As in North America and Europe, KSHV infection is strongly associated with both HIV-seropositive and HIV-seronegative KS in Africa. However, it is likely that infection with this virus is more highly prevalent in Uganda.(Arch Intern Med. 1996;156:202-204)
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