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Histological classification of canine ovarian cyst types with reference to the medical history
Yvonne Knauf1,2,*, Kernt Köhler3, Sascha Knauf4, Axel Wehrend1
1Clinic for Obstetrics, Gynaecology and Andrology of Large and Small Animals with Veterinary Ambulance, Justus-Liebig-University, Frankfurter Strasse 106, D 35392 Giessen, Germany
2Department of Animal Sciences, Georg-August-University, Burckhardtweg 2, D 37077 Goettingen, Germany
3Institute of Veterinary Pathology, Justus-Liebig-University, Frankfurter Strasse 96, D 35392 Giessen, Germany
4Department of Infection Biology, Work Group Neglected Tropical Diseases, German Primate Center, Leibniz-Institute for Primate Research, Kellnerweg 4, D 37077 Goettingen, Germany
Correspondence to: Tel: +49-5513921760; Fax: +49-5513933381; E-mail: Yvonne.knauf@uni-goettingen.de
Received: May 10, 2018; Revised: August 31, 2018; Accepted: September 17, 2018; Published online: October 8, 2018.
Ovaries of 21 bitches presented with gynecopathies were surgically removed and histologically examined. Standard histological as well as immunohistochemical classification of 193 cystic structures resulted in the classification of 72 cysts of subsurface epithelial structures (SES), 61 follicular cysts (FC), 38 cystic rete ovarii (CRO), 13 lutein cysts (LC), and another 9 non-classifiable cysts (NCC). In addition to the histological classification, results were interpreted in the context of the medical history, clinical examination outcome and macroscopic findings during ovariohysterectomy. Dogs with ovarian cysts (OCs) and associated reproductive perturbations were mostly nulliparous, and of large breed with an average of 9.5±3 years. Prolonged or shortened inter-estrus intervals of the past heats, however, seemed to be relative low risk factors for the development of OCs in dogs. Furthermore, we could provide a histological picture of a rarely seen canine LC including a degenerated oocyte in the central cavity.
Keywords: dog, ovarian cyst, histology, immunohistochemistry, medical history

© 2018 The Korean Society of Veterinary Science.