Fig. 2.

Acute and chronic endometritis identified by conventional histologic criteria have indistinguishable leukocytic infiltrates. Stored endometrial biopsy sections identified as normal tissue or acute or chronic endometritis were immunostained for CD3, CD8, CD20, CD138, CD56, CD68, and MHC II. Each stained section was scored for number of positive cells using the semi-quantitative scoring system described in text, and group comparisons made using Kruskal-Wallis test and Dunn’s multiple comparison test (* p < 0.05; ** p < 0.005; *** p< 0.001). Box and whiskers indicate median ± 10–90 percentile.