ABSTRACT
Two epidermoid cysts are described in mice, one intracranial, in the fourth ventricle and the other in the thoracic spinal canal. They were lined by compressed squamous epithelium and contained keratinaceous squamae. These incidental findings suggest that such cysts might be detected more often if more extensive examinations of the CNS were carried out in group studies.
Subject(s)
Brain Diseases/veterinary , Epidermal Cyst/veterinary , Mice , Rodent Diseases , Spinal Cord Diseases/veterinary , Animals , Brain Diseases/pathology , Cerebral Ventricles/pathology , Epidermal Cyst/pathology , Epithelium/pathology , Spinal Canal/pathology , Spinal Cord/pathology , Spinal Cord Diseases/pathologyABSTRACT
Feedlot calves given monensin in their feed developed an excessive mortality which peaked 3-4 mo after monensin was withdrawn. Typically the calves died suddenly and necropsy revealed areas of paleness in the skeletal muscles (early cases) and in the myocardium (more chronic cases). Histology (in 19 calves) showed swollen myocytes with loss of striation and sarcoplasmic vacuolization, followed by the appearance of necrotic fibres and infiltration with macrophages and neutrophils, and finally local and generalized fibrosis. Calcification was not evident. A differential diagnosis ruled out an etiology of nutritional and toxicological origin, thus leaving the probability of atypical (chronic) monensin toxicosis.
Subject(s)
Cardiomyopathies/chemically induced , Cattle Diseases/chemically induced , Foodborne Diseases/veterinary , Furans/poisoning , Monensin/poisoning , Muscular Diseases/chemically induced , Animal Feed/analysis , Animals , Cardiomyopathies/pathology , Cattle , Male , Monensin/analysis , Muscles/pathology , Muscular Diseases/pathology , Myocardium/pathologyABSTRACT
Lymphosarcoma of the mesenteric and mediastinal lymph nodes with peritoneal and mediastinal implantations, as well as widespread intravascular metastases and thrombosis with haemorrhages was diagnosed in a spotted hyena.
Subject(s)
Carnivora , Lymphoma, Non-Hodgkin/veterinary , Animals , Lymphoma, Non-Hodgkin/pathologySubject(s)
Protozoan Infections/pathology , Animals , Cattle , Cricetinae , Female , Gerbillinae , Goats , Guinea Pigs , Male , Mice , Rabbits , Species SpecificityABSTRACT
In nine sheep belonging to the same flock, C-cells hyperplasia of the thyroid, associated with calcinosis of the soft tissues is reported. The C-cells hyperplasia was probably due to excessive feeding with poultry waste, rich in calcium. The soft tissue mineralisation was a result of hypersecretion of calcitonin, a blood calcium-lowering hormone of the C-cells.
Subject(s)
Calcinosis/veterinary , Sheep Diseases/pathology , Thyroid Gland/pathology , Animals , Calcinosis/pathology , Calcium/blood , Female , Hyperplasia , Male , Myocardium/pathology , SheepABSTRACT
A case of transitional cell carcinoma of the prostatic and anterior pelvic urethra of a cat is presented. Primary urinarty tract neoplasms in the cat are rare, and transitional cell carcinoma with major involvement of the urethra has not been previously reported. The appearance and location of this tumor made differentiation from a prostatic carcinoma difficult. The clinical presentation consisted of emaciation, constipation, anorexia, and hematuria.
