Anatomical and Histological Features and Ovarian Hormone Analysis of Ovarian Cysts in Korean Native Cow and Dairy Cow

Kang, Byung-kyu; Choi, Han-sun; Chung, Young-ki

Korean Journal of Veterinary Research 1987;27(1):141-151.

Byung-kyu Kang, Han-sun Choi, Young-ki Chung

Department of Veterinary Medicine, College of Agriculture, Chonnam National University

한우(韓牛) 및 유우(乳牛)의 난소난종(卵巢囊腫)에 관한 해부조직학적(解剖組織學的) 소견(所見) 및 난소(卵巢)호르몬 분석(分析)

강병규, 최한선, 정영기

전남대학교 농과대학 수의학과

Abstract

A total of 1200 Korean native cow and 240 dairy cow genitalia were collected during the slaughtering process in Seoul and Kwang Ju abattoir and were examined from July 1985 to March 1986. Ovarian follicles were classified as cystic if the diameter was greater than 2.5cm or if follicles were multiple. In order to investigate the ovarian cysts, anatomical and histological examinations were performed. In addition progesterone and estrogen level in different types of cystic follicular fluid and serum were measured by radioimmunoassay. The results were summerized as follows: 1. The incidences of ovarian cysts were 2.0% in Korean native cow and 7.9% in dairy cow. 2. In distribution of cysts in the left, right and both ovaries, the most encountered ovary was right one. The frequency was 45.8% in right ovaries, 33.4% in left ovaries and 20.8% in both ovaries in Korean native cow. On the contrary the frequency was 42.1% in right ovaries, 31.8% in both ovaries and 26.3% in left ovaries in dairy cow. 3. Six speciemens (25.0%) of Korean native cow and six specimens (31.6%) of dairy cow were associated with corpora lutes in both ovaries. 4. The luteinization of theca layer was most significant in the group 2Aa (71.4%) and 2Ba (38.5%) which associated with no granulosa cell and corpora lutea in the same cystic ovaries. 5. Correlation of progesterone concentration between cystic fluid and serum was found only in the group 2Aa and 2Ab (r=0.86). Progesterone and estrogen concentrations in cystic fluid were closely related to the degree of degeneration of granulosa cell layer. The cystic follicles that consist of thickened theca and degenerated granulosa cell layers contained a large amount of progesterone, and small amount of estrogen. In conclusion, various types of ovarian cysts with various levels of progesterone and estrogen were observed in Korean native cow.