title: Ultrasonography and needle aspiration in diagnosis of xanthogranulomatous pyelonephritis.
abstract: Xanthogranulomatous pyelonephritis may present as a renal mass which can be difficult to differentiate from a hypovascular renal tumor by intravenous pyelography or selective renal angiography. Four patients are described in whom ultrasonography with or without fine-needle aspiration suggested or confirmed the diagnosis of xanthogranulomatous pyelonephritis.
mesh_terms: D000328:Adult; D001707:Biopsy, Needle; D005260:Female; D006801:Humans; D007668:Kidney / Q000473:pathology*; D008875:Middle Aged; D011705:Pyelonephritis, Xanthogranulomatous / Q000175:diagnosis*; D014463:Ultrasonography