Orbital unicentric Castleman's disease of plasma cell type: A rare case report

Castleman's disease (CD) is a rare lymphoproliferative disorder. Recently, we admitted a 68-year-old male with CD presenting as a retro-orbital mass, who had been treated with a surgical procedure. The pathology report was in favor of CD, plasma cell type, which is a rare pathologic type in this clinical entity. Space-occupying lesion of the orbit is an extremely unusual condition of CD. So, we consider that this case was a rare case of CD involving atypical location and atypical pathologic findings.