Authors report a case of Castleman's disease (CD) with polyneuropathy, organomegaly, endocrinopathy, M protein, skin change (POEMS) syndrome. According to the present knowledge, these two rare conditions are often induced by Human Herpes Vírus- 8 (HHV-8) or by Human Immunodefeciency Virus, separately or in combination. In this case, however, HHV-6 viral DNA had been detected in the blood and lymph node samples by PCR. The authors conclude that the modulation of immune functions by HHV-6 might be responsible for the development of CD and POEMS syndrome in the referred case.
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