Relationship between Follicle Wall Diameter, Secretory Activity, and Histopathological Characteristics of Cyst-like Structures in Bovine Ovaries: An Abattoir Survey

Ovarian cystic follicles are one of the most important reproductive problems in cows and animal husbandry. The aim of this study was to evaluate the relationship between follicle wall diameter and secretory and histopathological characteristics of cyst-like structure in the diagnosis of the type of ovarian cysts in slaughtered cows. In this study, ۲۸ follicles larger than ۲۵ mm in diameter and eight samples of follicles smaller than ۲۰ mm in diameter were examined. Based on the criteria of follicular wall diameter, the samples were classified into three groups: control (non-cystic), follicular, and luteal groups. Pathological sections were prepared, and the levels of estrogen and progesterone in cystic fluids were measured using the ELISA method. The ultrasound evaluations revealed a statistically significant difference in follicle diameter among the control group and the luteal and follicular cystic groups. A significant increase was also seen in the mean follicular wall diameter, luteal, control and follicular cystic groups. Moreover, a significant difference in progesterone concentration was also observed between the control and the luteal cystic groups (p<۰.۰۵). During imaging, the cystic wall diameters were ۲.۵ mm, and they must be considered as follicular cysts (the wall diameter of <۳ mm criterion); surprisingly, they were classified as luteal cysts in the histopathological evaluation. In conclusion, according to the pathological examination, ۳ mm of wall thickness is not a good criterion for the diagnosis of ovarian cyst type, because luteal cysts may have a wall diameter of less than ۳ mm.

کلیدواژه ها:

cow ، Histopathology ، Ovarian cysts ، progesterone ، Ultrasonography