What does sq epi indicate in urinalysis?

In urinalysis, "sq epi" typically refers to squamous epithelial cells. The presence of these cells can indicate contamination of the urine sample, as they are commonly shed from the lining of the urethra or external genitalia. While a few squamous epithelial cells can be normal, a significant increase may suggest improper sample collection or, in some cases, underlying conditions that need further investigation.