Fig. 3

a-d Cystic endometrial hyperplasia (CEH). Uterus from an 8 year old bitch. a Macroscopic image, longitudinal incision of the uterine horns. Macroscopically observed cysts on the surface of the endometrium. Thickened and reddened mucosa. A small amount of serous-bloody discharge was observed inside the horns. b, c, d H&E stained histological images of transverse uterine horn fragment. Microscopically visible multifocal cystic hyperplasia of glands with a clear flattening of the glandular epithelial cells (arrows) and mild edema of the endometrium (triangle). There are also acute, multifocal endometrial haemorrhage of slight degree (asterisks). Magnification: b 20x; c 100x, d 400x