Alterações patológicas em rete ovarii de fêmeas bovinas

Abstract

Ovaries are essential reproductive organs of the female, for its endocrine and gametogenic functions. Rete ovarii is characterized as anastomosed tubules revested by columnar or cuboid epithelium with slightly eosinophilic cytoplasm, and though its function is not yet clear, it has been proposed an endocrine function, besides structural organization of the gonad during embryonic life. Pathological alterations in Rete ovarii are, in most cases, of difficult macroscopic diagnosis and this area is associated as a cyst development site. The purpose of this research was to demonstrate the main pathological alterations in rete ovarii from ovaries obtained from slaughterhouses. Ovaries of 467 animals were collected in slaughterhouses in the metropolitan area of Belo Horizonte - MG, where they were identified and tranversally sectioned, obtaining two fragments of the hilum area, so as to increase probability of rete ovarii be observed in them. Protocols of fixation, dehydration, clearing, infiltration and embedding in paraffin, cut at 4um and colored in hematoxylin and eosin staining were conducted. Evaluated slides in light microscopy showed rete ovarii in both sides of 417 animals (89.3%). 23 (4.9%) cases of adenomatous hyperplasia of the rete ovarii were found, characterized by acinar and slightly eosinophilic cytoplasm cuboid epithelium. 15 (65, 22%) of those were associated to inflammatory infiltrates and fibroplasia in the hyperplasic area" It was also possible to find 24 (5.75%) cystic formations that may have surged from alterations of rete ovarii. Alterations in Rete ovarii are common and it is important to know them to minimize further reproductive issues.