title: Nuclear imaging of an extraskeletal retroperitoneal osteosarcoma: respective contribution of 18FDG-PET and (99m)Tc oxidronate (2005:1b).
abstract: Extraskeletal osteosarcoma (ExOs) is a rare, usually highly aggressive malignancy, which affects individuals beyond the fifth decade of life. ExOs prinicipally occurs as a soft tissue mass in a limb or retroperitoneum. We present the case of a 58-year-old man with a huge abdominal mass who underwent a complete range of clinical imaging investigations including computed tomography (CT), skeletal scintigraphy (BS) and positron emission tomography (PET). These exams showed a central calcified and ossified, strongly metabolic retroperitoneal tumour suggestive of an ExOs. This diagnosis was later confirmed by histopathology. To our knowledge, such a case has not previously been documented fully using radiological imaging correlated to modern nuclear medicine techniques such as PET.
authors.affiliation: Department of Radiology, Division of Nuclear Medicine, University Hospitals, Geneva, Switzerland. hamdan6@etu.unige.ch
authors.forename: A
authors.initials: A
authors.lastname: Hamdan
authors.forename: J
authors.initials: J
authors.lastname: Toman
authors.forename: S
authors.initials: S
authors.lastname: Taylor
authors.forename: A
authors.initials: A
authors.lastname: Keller
mesh_terms: D019788:Fluorodeoxyglucose F18; D006801:Humans; D008297:Male; D008875:Middle Aged; D012516:Osteosarcoma / Q000000981:diagnostic imaging*; D049268:Positron-Emission Tomography; D019275:Radiopharmaceuticals; D012186:Retroperitoneal Neoplasms / Q000000981:diagnostic imaging*; D013669:Technetium Tc 99m Medronate / Q000031:analogs & derivatives*
chemical_list: D019275:Radiopharmaceuticals; D019788:Fluorodeoxyglucose F18; C024226:technetium Tc 99m hydroxymethylene diphosphonate; D013669:Technetium Tc 99m Medronate