title: Retroperitoneal Castleman's disease presenting with hydronephrosis indistinguishable from lymphoma.
abstract: Castleman's disease is a rare benign lymphoproliferative disease. We describe a patient with an unusual case of retroperitoneal Castleman's disease who initially presented with hydronephrosis. Her disease manifested with a malignant appearance in positron emission tomography/computed tomography and was located in the common and internal iliac area. Retrograde double-J stent insertion failed and nephrostomy was then performed. Complete surgical removal of the disease failed because the disease was severely adherent to the ureter and adjacent iliac vessels. Antegrade double-J stent insertion also failed. The patient eventually underwent laparoscopic ureteroneocystostomy. Retroperitoneal Castleman's disease should be added to the extensive list of differential diagnoses for primary retroperitoneal tumors.
authors.affiliation: Department of Obstetrics and Gynecology, School of Medicine, Kyung Hee University Medical Center, Seoul, Korea.
authors.forename: Young Sun
authors.initials: YS
authors.lastname: Kim
authors.forename: Min Hyung
authors.initials: MH
authors.lastname: Jung
mesh_terms: D015746:Abdominal Pain / Q000209:etiology; D000328:Adult; D005871:Castleman Disease / Q000000981:diagnostic imaging* / Q000503:physiopathology / Q000601:surgery; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D006869:Hydronephrosis / Q000175:diagnosis*; D008223:Lymphoma / Q000175:diagnosis*; D008279:Magnetic Resonance Imaging; D064847:Multimodal Imaging; D049268:Positron-Emission Tomography; D012186:Retroperitoneal Neoplasms / Q000175:diagnosis*; D012187:Retroperitoneal Space; D014057:Tomography, X-Ray Computed