title: Renal-related perinephric fluid collections: MRI findings.
abstract: We retrospectively reviewed MR studies on 10 patients with renal-related perinephric fluid collections who underwent MRI in three institutions between January 2001 and August 2004. All patients underwent MRI of the abdomen and T1-weighted, T2-weighted and serial contrast-enhanced images, including delayed-phase contrast-enhanced images 10-12 min after contrast injection, were obtained. Perinephric fluid collections in 5 patients revealed MRI findings of simple fluid content (i.e., hypointense on T1-weighted images and hyperintense on T2-weighted images). In another 5 patients, a complex perinephric fluid content (i.e., mixed hyper/hypointense on T1-weighted images and mixed hypo/hyperintense on T2-weighted images compatible with blood breakdown products and pus) was observed. In 5 patients, contrast extravasation on late-phase images that was compatible with urine leak was demonstrated. Our results suggest that MRI may determine the content of perinephric fluid collections on noncontrast T1-weighted and T2-weighted images and that contrast extravasation on late-phase images is associated with urine extravasation from renal collecting systems.
authors.affiliation: Department of Radiology, SLU, St. Louis, MO 63110, USA. nc.balci@excite.com
authors.forename: N Cem
authors.initials: NC
authors.lastname: Balci
authors.forename: Elif
authors.initials: E
authors.lastname: Akun
authors.forename: Mehmet
authors.initials: M
authors.lastname: Erturk
authors.forename: Sezer
authors.initials: S
authors.lastname: Saglam
authors.forename: Nagihan
authors.initials: N
authors.lastname: Inan
authors.forename: Yesim
authors.initials: Y
authors.lastname: Balci
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002648:Child; D003287:Contrast Media / Q000008:administration & dosage; D003937:Diagnosis, Differential; D005260:Female; D019786:Gadolinium DTPA / Q000008:administration & dosage; D006470:Hemorrhage / Q000175:diagnosis; D006801:Humans; D006869:Hydronephrosis / Q000175:diagnosis; D007275:Injections, Intravenous; D007674:Kidney Diseases / Q000175:diagnosis*; D007680:Kidney Neoplasms / Q000175:diagnosis; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies
chemical_list: D003287:Contrast Media; D019786:Gadolinium DTPA