FIGURE 3
From: Topoisomerase IIα Expression in Pituitary Adenomas and Carcinomas: Relationship to Tumor Behavior

Topo IIα–labeling index in treated and untreated pituitary tumors. The data are expressed as percentage of Topo IIα–immunopositive cells and represent the mean ± SEM. Values with no letters in common are significantly different (P < .05; statistical analysis with the Kruskall-Wallis analysis of variance and the Mann-Whitney U test).