In contrast, B7-H2 protein was moderately expressed in some epithelial and stromal cells in the eutopic endometrium from adenomyosis patients (ADE-EU) (Fig. 1c and d) and intensely expressed in the ectopic endometrium from adenomyosis patients (ADE-EC) (Fig. 1a and b). This evidence concerns the gene ICOSLG and adenomyosis.