A minimum of 15 eosinophils per high-power field are required to make the diagnosis.

The presence of more than 20 WBC per high-power field in the urine is more suggestive of a urinary tract disorder.

The leukocyte esterase test detects the presence of neutrophil granules and connotes pyuria greater than or equal to 8 to 10 white blood cells per high-power field.

Traditionally, the number of red blood cells per high-power field of a microscope has been the standard, reaching significance when there are more than 3 to 5 red cells per field.

In the COG prospective clinical trial (INT0098), nine children with stage I (completely resected) pure fetal histology and fewer than two mitoses per high-power field were treated with adjuvant doxorubicin for four cycles.

A Gram stain of unspun urine that reveals 1 to 2 bacteria per high-power field or a Gram stain of spun urine that reveals 20 bacteria per high-power field corresponds to greater than 105 colony-forming unites (CFU) per milliliter of urine.