title: An unusual retroperitoneal tumor in a young woman.
authors.affiliation: Department of Family Medicine, National Taiwan University Hospital and National Taiwan University College of Medicine, Taipei, Taiwan.
authors.forename: Hsiao-Ching
authors.initials: HC
authors.lastname: Nien
authors.forename: Huang-Chun
authors.initials: HC
authors.lastname: Lien
authors.forename: Chien-Hung
authors.initials: CH
authors.lastname: Chen
mesh_terms: D000328:Adult; D001706:Biopsy; D005871:Castleman Disease / Q000000981:diagnostic imaging*; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D006818:Hyalin; D011859:Radiography; D012186:Retroperitoneal Neoplasms / Q000000981:diagnostic imaging*; D012187:Retroperitoneal Space / Q000000981:diagnostic imaging*; D014463:Ultrasonography