What are the histologic findings characteristic of urinary tract infection (UTI) during pregnancy?

Updated: Aug 17, 2021
  • Author: Raisa O Platte, MD, PhD; Chief Editor: Edward David Kim, MD, FACS  more...
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Answer

On urine cytology, clumping white blood cells (WBCs) and WBC casts are consistent with pyelonephritis. Red blood cell (RBC) casts are characteristic of acute glomerulonephritis and should be suspected after a recent or concurrent streptococcal infection.

Renal involvement usually leads to proteinuria. Nephrotic syndrome includes high proteinuria (>3.5 g/24 h), edema, hypercholesterolemia, and hypoalbuminemia; however, this can be confused with preeclampsia. Oval fat bodies and fatty casts can suggest membranous glomerulonephritis.


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