• Swiss medical weekly · Jun 1997

    [Detection of human herpesvirus 8 (HHV 8) in Kaposi sarcomas of the gastrointestinal tract].

    • G Cathomas, A Stalder, C E McGandy, F Gudat, and L M Terracciano.
    • Institut für Pathologie, Universität Basel.
    • Swiss Med Wkly. 1997 Jun 7; 127 (23): 988-91.

    AbstractInvolvement of Kaposi's sarcoma in the gastrointestinal tract is common in AIDS patients. The disease is, however, usually asymptomatic and, due to the tumor growth primarily in the submucosa, biopsy diagnosis is possible in under 25%. The recently described human herpes virus 8 (HHV8) is closely associated with all forms of Kaposi's sarcoma. Detection of HHV8 in the tissue samples may therefore improve the diagnosis of gastrointestinal Kaposi's sarcoma. In the present study we analyze autopsy samples of tumor and non-tumor tissue from the gastrointestinal tract in patients with and without Kaposi's sarcoma for the presence of HHV8 DNA using a nested polymerase chain reaction (PCR) assay. HHV8 DNA was present in all 15 tissues with Kaposi's sarcoma. In contrast, HHV8 DNA was present only in 3 (18.8%) of 16 gastrointestinal tissues of patients with Kaposi's sarcoma but without histologically detectable tumor. No HHV8 DNA was present in 15 tissue samples of AIDS patients without Kaposi's sarcoma. Our data show that detection of HHV8 DNA using a nested PCR assay is a highly sensitive and specific diagnostic test for Kaposi's sarcoma in autopsy tissue samples from the gastrointestinal tract. It should therefore be possible to use detection of HHV8 DNA in biopsy material as an assay for the diagnosis of Kaposi's sarcoma.

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