Tonsillar Kaposi sarcoma in a patient with membranous glomerulonephritis on immunosuppressive therapy

July 21, 2013
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Kaposi sarcoma is a malignant vascular neoplasm uncommonly seen in immunosuppressed patients. Herein we report an unusual case of tonsillar Kaposi sarcoma in a patient with membranous glomerulonephritis treated with prednisolone and cyclosporine. The patient presented after 10 months of starting the treatment with a tonsillar mass. Histological examination was typical of monomorphic spindle cell proliferation with slit-like vascular channels. The tumor cells expressed CD34, D2-40 and positive nuclear stain for HHV-8. Kaposi sarcoma is associated with immunosuppression and rarely occurs in the tonsil. Clinicians should be aware of this rare presentation of Kaposi sarcoma.


Kaposi sarcoma (KS) is an uncommon malignant vascular neoplasm first described by Moritz Kaposi in 1872 as enlarged nodules involved the skin and other internal organs.1 Later after identification of HIV infection and AIDS, KS was more reported in homosexual patients.2

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