title: FDG PET/CT incidental diagnosis of a synchronous bladder cancer as a fourth malignancy in a patient with head and neck cancer.
abstract: A 74-year-old man with 40-year history of smoking and known history of chronic lymphocytic leukemia and cutaneous T-cell lymphoma underwent FDG PET/CT examination for a recent diagnosis of squamous cell carcinoma diagnosed from right frontal crown and left posterior ear skin biopsy. PET images revealed multiple FDG-avid lesions in the head and neck, highly suspicious for nodal metastases. Reviewing CT portion of PET/CT examination revealed a hyperattenuating density in the posterior bladder wall. This lesion was not noticed initially due to the intense physiologic bladder uptake. On lowering the intensity, this lesion showed intense FDG avidity on the PET portion of the examination. Cytoscopic biopsy revealed low-grade papillary urothelial cell carcinoma.
authors.affiliation: Division of Nuclear Medicine, Department of Radiology, Saint Louis University Hospital, St Louis, MO 63110, USA. mosman@slu.edu
authors.forename: Medhat M
authors.initials: MM
authors.lastname: Osman
authors.forename: Mustafa E
authors.initials: ME
authors.lastname: Altinyay
authors.forename: Amir G
authors.initials: AG
authors.lastname: Abdelmalik
authors.forename: Todd M
authors.initials: TM
authors.lastname: Brickman
authors.forename: Mark A
authors.initials: MA
authors.lastname: Varvares
authors.forename: Nghi C
authors.initials: NC
authors.lastname: Nguyen
mesh_terms: D000368:Aged; D019788:Fluorodeoxyglucose F18; D006258:Head and Neck Neoplasms / Q000175:diagnosis* / Q000473:pathology / Q000503:physiopathology; D006801:Humans; D033162:Incidental Findings; D008297:Male; D009378:Neoplasms, Multiple Primary / Q000175:diagnosis* / Q000473:pathology / Q000503:physiopathology; D049268:Positron-Emission Tomography; D014057:Tomography, X-Ray Computed; D001749:Urinary Bladder Neoplasms / Q000175:diagnosis* / Q000473:pathology / Q000503:physiopathology
chemical_list: D019788:Fluorodeoxyglucose F18