REGIONAL LYMPHADENOPATHIES IN PATIENTS WITH RENAL CALCULI - ANALYSIS WITH ULTRASOUND AND MRI

Thirty-nine patients with renal calculi were retrospectively studied w ith magnetic resonance (MR) imaging and an ultrasound (US). All patien ts were examined as part of a research project for imaging evaluation of complications of extracorporeal shock wave lithotripsy. Twelve of t he patients showed lymph node enlargement in the retroperitoneal periv ascular space. Adenopathies were visualized by MR imaging but not with US: The presence of large lymph nodes was associated with urinary, re nal parenchymal, or stone infection. When large lymph nodes are found in the retroperitoneal perivascular space in patients with lithiasis, urinary tract infection must be assumed as the cause of these adenopat hies.