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Histologic findings: Eosinophils per high-power field Caldwell-Luc Non-Caldwell-Luc Mean 5.
Esophageal biopsies before and after the 6 weeks of treatment showed that intraepithelial eosinophil counts decreased significantly, from a median of 41 per high-power field to less than 1 per high-power field (Gastroenterology 1995;109:1503-12).
In most microscopes, this will be about 3 to 4 high-power fields; however, the field area should be determined in individual microscopes by determining the diameter of a high-power field by using a stage micrometer or a ruler and with the formula pr2.
Grade 1: [less than or equal to] 5 centroblasts per high-power field (HPF)
Histology is diagnostic when the eosinophil infiltration is greater than 20 eosinophils per high-power field (HPF) in the squamous epithelium.
The CAP Invasive Breast Cancer Protocol provides a method for pathologists to determine the diameter of their microscope's high-power field by using a ruler and algebra.
Histologic evaluation revealed 7 mitotic figures per high-power field.
2] HPF (a) Median Range Ductal 22 266 487 455 198-909 Lobular 9 240 440 455 130-682 Tubular 2 173 316 316 221-410 Mucinous 2 173 316 316 124-511 Medullary 2 292 534 534 401-670 Adenocystic 1 506 927 Papillary 1 252 461 Abbreviation: HPF, high-power field.
The average count of IgG4-positive plasma cells per high-power field was greater than 35 (35.