Castleman's disease.
D006222:Hamartoma / Q000473:pathology; D006801:Humans; D006818:Hyalin / Q000166:cytology; D006965:Hyperplasia; D008198:Lymph Nodes / Q000473:pathology*; D008479:Mediastinal Neoplasms / Q000473:pathology; D008643:Mesentery; D010950:Plasma Cells / Q000473:pathology