Hyperplasia, depicted in the images below, can be idetified by the presence of cystic dilatations and back to back lined glands. The epithelial growth pattern is similar to proliferative endometrium i.e. multilayered glands can be seen, also known as stratification of glandular epithelium. Mitosis is not very apparent and stroma between the glands is dense.
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Compare it with normal histology of endometrium