Abnormal urinalysis in acute appendicitis.

In a retrospective review of 32 consecutive patients (20 adults and 12 children) with acute appendicitis, we correlated abnormal urinalysis with the operative findings. Abnormal results on urinalysis were noted in 10 adults and 5 children. All urine specimens were collected by the clean-catch method. Abnormal findings were found more frequently in female patients. The majority of the patients with abnormal urinalysis had a ruptured or inflamed appendix in proximity to the urinary tract.