Primary-Effusion Lymphoma and Kaposi's Sarcoma in a Cardiac-Transplant Recipient

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Abstract
Human herpesvirus 8 (HHV-8) is a recently discovered virus that appears to have a pathogenic role in Kaposi's sarcoma, multicentric Castleman's disease, and primary-effusion lymphoma, a distinctive lymphoma that arises within body-cavity effusions.1-7 HHV-8 was originally detected in lesions of Kaposi's sarcoma in patients infected with the human immunodeficiency virus (HIV) but was subsequently found in forms of the tumor that occur in HIV-negative patients.8,9 Similarly, HHV-8–associated multicentric Castleman's disease occurs predominantly in patients with the acquired immunodeficiency syndrome (AIDS) but also in HIV-negative patients.5,10,11 These findings suggest a direct causal role of HHV-8 in the development of Kaposi's sarcoma and multicentric Castleman's disease, with HIV-induced immunosuppression serving as a secondary factor.

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