title: Thrombosed right renal vein varix simulating a renal pelvic mass.
abstract: A solitary thrombosed varix of the right renal vein was mistaken preoperatively for a renal tumor. Computed tomography, retrograde pyelography, arteriography, and needle biopsy did not establish the diagnosis. Renal venography would have confirmed the diagnosis of this extremely rare condition.
mesh_terms: D003937:Diagnosis, Differential; D003951:Diagnostic Errors; D006801:Humans; D007680:Kidney Neoplasms / Q000000981:diagnostic imaging*; D007682:Kidney Pelvis / Q000098:blood supply*; D008297:Male; D008875:Middle Aged; D012082:Renal Veins / Q000000981:diagnostic imaging*; D013927:Thrombosis / Q000000981:diagnostic imaging*; D014057:Tomography, X-Ray Computed; D014567:Urography; D014648:Varicose Veins / Q000000981:diagnostic imaging*