Acute Pyelonephritis

Acute Pyelonephritis •The photograph shows a tubule with numerous neutrophils in the lumen. •These neutrophils have migrated through the tubular epithelium from the inflamed interstitium. •Collections of neutrophils in tubular lumens as shown here give rise to white cell casts. (Description By:H. Yamase, M.D. ) (Image Contrib. by: UCHC )