Squamous metaplasia of rete ovarii is characterized by replacement of the normal cuboidal epithelium of rete ovarii by a keratinized stratified scamous epithelium, leading to accumulation of keratinized material within the tubules and cystic dilatation of rete ovarii. The present study decribes a case of scamous metaplasia of rete ovarii in a 10 year old Zebu cow, including clinical, surgical, ultrasonographic, histopathological and hormonal findings. At first ultrasound examination the cow had lightly asymmetric ovaries with follicles presenting echogenicity similar to luteinized follicular cysts. After transvaginal follicular aspiration creamy yellowish sanguineous-purulent content was recovered. After unilateral ovariectomy the ovary was sectioned and brownish viscous material drained from cystic cavity. Histopathology confirmed the diagnosid of squamous metaplasia of the rete ovarii. Progesterone concentrations assessed by chemiluminescent enzyme immunoassay within different time periods after ovariectomy showed that pathology did not compromise normal luteal ovarian activity in a contralateral reminiscent ovary.

Body mass is one of the most influencing factors of metabolic rate and gas exchange of animals, and also related to activity pattern and occupancyof ecological niches. This study aimed to understand the relationships between body mass (MB) and morpho-functional features ofthe lungs of Iguana iguana, through morphological and morphometric characterization of the structural elements of the respiratory system.Iguana iguana has lungs of the transitional type, the heterogeneously distributed parenchyma being faveolar in cranial and medial regionsand trabecular in the caudal region. Within the parenchyma, 43.6 ± 25.5% corresponds to faveoli, 18.0 ± 5.9% to interfaveolar septa, and38.7 ± 31.6% to trabeculae. Within the interfaveolar septa, 9.4 ± 4.0% corresponds to blood capillaries, 4.4 ± 1.0% to type I pneumocytes And 3.9 ± 1.1% to type II pneumocytes. Allometric analyses showed that lung (MB 0.8949) and parenchymal volume (MB 1.030) scale with MB in I. iguana just as in other lizards with unicameral or transitional lungs, which was unexpected for lung volume, since reptilian lung volume is generally considered to scale as MB 0.75. The functional orphology of the lungs in I. iguana seems to play an important role to meet the metabolic demands through ontogenetic growth.