title: Immunohistochemical evaluation of canine ovarian cysts.
abstract: To clarify the immunohistochemical characteristics of canine ovarian cysts, 109 canine ovarian cysts (57 cysts of subsurface epithelial structures: SES, 26 graafian follicle cysts, 12 cystic rete ovarii and 14 cysts difficult to classify morphologically) were examined regarding their lining cells immunohistochemically using antibodies against placental alkaline phosphatase (PLAP), S100, inhibin alpha, desmin and AE1/AE3. Both cysts of SES and cystic rete ovarii had a positive immunoreaction to desmin and AE1/AE3, whereas all cysts all but graafian follicle cysts were negative for inhibin alpha. PLAP-positive immunoreaction was observed only in cysts of SES. Graafian follicle cysts had a positive immunoreaction to inhibin alpha, but were negative for PLAP, desmin and AE1/AE3. Fourteen cysts were difficult to classify morphologically because these cysts had single-squamous lining cells and lacked other morphological characteristics. However, these unclassified cysts were immunohistochemically divided into two groups, including positive and negative cysts, by the reactivity of PLAP. The PLAP-positive cysts were considered large cysts of SES. These results suggest that PLAP was a useful marker for classification of cysts of SES, although cysts originating from SES are not always positive for this antigen.
authors.affiliation: Department of Veterinary Pathobiology, Rakuno Gakuen University, Hokkaido, Japan.
authors.forename: Yuko
authors.initials: Y
authors.lastname: Akihara
authors.forename: Yumiko
authors.initials: Y
authors.lastname: Shimoyama
authors.forename: Kazufumi
authors.initials: K
authors.lastname: Kawasako
authors.forename: Misa
authors.initials: M
authors.lastname: Komine
authors.forename: Kazuko
authors.initials: K
authors.lastname: Hirayama
authors.forename: Yumiko
authors.initials: Y
authors.lastname: Kagawa
authors.forename: Tetsuo
authors.initials: T
authors.lastname: Omachi
authors.forename: Kazuya
authors.initials: K
authors.lastname: Matsuda
authors.forename: Minoru
authors.initials: M
authors.lastname: Okamoto
authors.forename: Tsuyoshi
authors.initials: T
authors.lastname: Kadosawa
authors.forename: Hiroyuki
authors.initials: H
authors.lastname: Taniyama
mesh_terms: D000818:Animals; D004283:Dog Diseases / Q000276:immunology*; D004285:Dogs; D005260:Female; D007150:Immunohistochemistry / Q000662:veterinary*; D010048:Ovarian Cysts / Q000276:immunology / Q000662:veterinary*