Ovarian Papillary Cystadenoma with Pyometra Cystic Endometrial Hyperplasia Complex in a Bitch

Canine pyometra is a diestrual disorder and a more common condition in older bitches (>7 years) that is often life-threatening.  Cystic endometrial hyperplasia (CEH) is a subclinical condition  characterized by the proliferation of endometrial glands resulting  in the formation of fluid-filled cysts with luminal uterine contents  (Schlafer and Gifford, 2008), and this allows bacterial proliferation  in the uterus at diestrus under the influence of progesterone which  results in the formation of pyometra (Verstegen et al., 2008). The  concurrent occurrence of Pyometra-CEH complex with an ovarian  tumor is rare and often taken as a severe threat to act immediately.  In the present case, the concurrent occurrence of ovarian papillary  cystadenoma with pyometra-CEH in a bitch is reported and  discussed.