Multicentric Castleman's disease: Report of three cases.

Castleman's disease is an uncommon benign B-cell lymphoproliferative disorder. According to lymph nodes distribution, there are two distinct subtypes of disease: unicentric and multicentric. Unicentric Castleman's disease is more common, localized to one site, and locally treated. On the contrary, multicentric form is a rare systemic disease characterized by diffuse lymphadenopathy and inflammatory symptoms. We report three cases of persons that were initially suspected to have a lymphoma but were later histologically confirmed to have Multicentric Castleman's Disease. In addition, our work aims to investigate the role of fluorodeoxyglucose (FDG) PET/CT in evaluation of this rare condition.