title: Case 117: actinomycosis of left kidney with sinus tracts.
abstract: A 39-year-old Samoan man presented to the emergency department with fever, progressive weakness, and left flank pain of 1-month duration. For several months, he had also experienced progressive weight loss. There was no history of recent trauma, and he was not taking any medication. His medical history was notable for a large left groin abscess and left lower lobe pneumonia of unknown cause 1 year prior to the current admission. Furthermore, he had undergone exploratory laparotomy and gastric surgery for peptic ulcer disease approximately 10 years ago. Physical examination findings were positive for a tender firm mass in the left flank with no associated skin changes. Laboratory findings revealed an elevated white blood cell count of 18 x 10(9)/L. The urine cultures were negative. A computed tomographic (CT) image obtained 1 year prior to the current admission was unremarkable. CT of the abdomen and pelvis (section thickness, 5 mm) was performed after ingestion of 900 mL of 2% diatrizoate meglumine and diatrizoate sodium (Gastrografin; Bracco Diagnostics, Princeton, NJ). A 150-mL dose of iohexol (300 mg of iodine per milliliter) (Omnipaque; Nycomed, New York, NY) was administered intravenously at a rate of 4 mL/sec with a 70-second scan delay. Unenhanced CT images (not shown) did not reveal any areas of high attenuation.
authors.affiliation: Department of Radiology, San Francisco General Hospital, University of California San Francisco Medical School, Box 0628, San Francisco, CA 94143-0628, USA.
authors.forename: Panuch
authors.initials: P
authors.lastname: Yenarkarn
authors.forename: Ruedi F
authors.initials: RF
authors.lastname: Thoeni
authors.forename: Douglas
authors.initials: D
authors.lastname: Hanks
mesh_terms: D000196:Actinomycosis / Q000000981:diagnostic imaging*; D000328:Adult; D003287:Contrast Media; D003937:Diagnosis, Differential; D003974:Diatrizoate Meglumine; D006801:Humans; D007472:Iohexol; D007674:Kidney Diseases / Q000000981:diagnostic imaging*; D008297:Male; D014057:Tomography, X-Ray Computed
chemical_list: D003287:Contrast Media; D003974:Diatrizoate Meglumine; D007472:Iohexol