title: Bladder diverticulum simulating a pelvic metastasis on a Tc-99m HDP bone scan.
abstract: Carcinoma of the prostate was diagnosed in a 74-year-old man. A Tc-99m HDP bone scan was performed as part of the initial staging process. The findings on the bone scan were normal except for an area of increased tracer uptake projected over the left sacroiliac joint, which was seen best on the anterior view. When this was investigated further, the findings of a plain radiograph were inconclusive. Computed tomography showed a large diverticulum projecting from the left side of the bladder; the tracer retained within this diverticulum had produced the findings on the bone scan.
authors.affiliation: Department of Radiology, Derriford Hospital, Plymouth, Devon, United Kingdom. kimfarmer8@hotmail.com
authors.forename: K D
authors.initials: KD
authors.lastname: Farmer
authors.forename: L R
authors.initials: LR
authors.lastname: Gellett
authors.forename: G C
authors.initials: GC
authors.lastname: Vivian
authors.forename: K
authors.initials: K
authors.lastname: Franklin
mesh_terms: D000368:Aged; D001859:Bone Neoplasms / Q000000981:diagnostic imaging / Q000556:secondary; D001842:Bone and Bones / Q000000981:diagnostic imaging*; D003937:Diagnosis, Differential; D004240:Diverticulum / Q000000981:diagnostic imaging*; D006801:Humans; D008297:Male; D010386:Pelvic Neoplasms / Q000000981:diagnostic imaging* / Q000556:secondary*; D011471:Prostatic Neoplasms / Q000473:pathology; D011877:Radionuclide Imaging; D019275:Radiopharmaceuticals; D013669:Technetium Tc 99m Medronate / Q000031:analogs & derivatives*; D001745:Urinary Bladder Diseases / Q000000981:diagnostic imaging*
chemical_list: D019275:Radiopharmaceuticals; C024226:technetium Tc 99m hydroxymethylene diphosphonate; D013669:Technetium Tc 99m Medronate