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August 15, 1966

Pregnancy May Veil Urinary Calculi

JAMA. 1966;197(7):39. doi:10.1001/jama.1966.03110070025010

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Urinary calculi should be suspected as the underlying cause of recurrent pyelonephritis or cystitis and certain other abdominal problems during pregnancy, two University of Missouri investigators suggest.

Although urinary lithiasis is relatively uncommon during pregnancy and is generally considered a disease of middle age, T. M. King, MD, and William T. Griffin, MD, found the condition was present in seven patients with recurrent urinary tract infections. The average age of the patients was 24.5 years, and all were multigravidas.

Urinary tract stones may be overlooked during pregnancy for several reasons, Dr. King, assistant professor, Department of Obstetrics and Gynecology, said. The resulting symptoms may be attributed to alterations in ureteral motility and tone, combined with the compression of the ureters at the pelvic brim by the gravid uterus.

Many times the pregnant patient with urinary calculi appears to have symptoms of "surgical abdomen which are suggestive of appendicitis or even