Castleman's disease is an uncommon clinicopathologic entity that results in
unregulated growth of lymphoid tissue. It may present as benign involvemen
t of one IJ mph node group or as multicentric disease with serious systemic
symptoms. Pleural effusions are an uncommon manifestation of Castleman's d
isease. We present a patient with Castleman's disease who initially present
ed with a chylous pleural effusion.