HYPERTHYROIDISM IN CATS, FELINE THYROID NEOPLASIA, CYSTS
 
Description    Hyperthyroidism, the most-frequently-diagnosed feline endocrinopathy, is usually caused by an adenoma or adenomatous hyperplasia and less often by adenocarcinoma. Enlarged thyroids might be palpated close to the trachea anywhere from caudal to the larynx to the thoracic inlet; in about 3/4 of cases both thyroid lobes are enlarged. Hypertrophic cardiomyopathy that can lead to heart failure can accompany hyperthyroidism. Large Thyroid Cysts in hyperthyroid or euthyroid cats with benign or malignant thyroid tumors can cause problems by mechanical obstruction.
 
Species   Feline
 
Signs   Abnormal behavior, aggression, changing habits, Abnormal lung or pleural sounds, Abnormal upper airway breathing sounds, Alopecia, Anorexia, Arrhythmia, Ataxia, Atrial tachycardia, Atrial, supraventricular, premature beat, Blindness, Bundle branch block, Change in voice, Congestion oral mucous membranes, Constant or increased vocalization, Coughing, Decreased, muffled, lung sounds, Dehydration, Diarrhea, Dryness of skin or hair, Dullness, Dysphagia, Dyspnea, Excitement, Fever, First degree atrioventricular heart block, Gallop rhythm, Generalized weakness, Heart murmur, Hyperesthesia, Hyphema, Increased respiratory rate, Increased strength of pulse, Laryngeal, tracheal, pharyngeal swelling, Matted or dirty hair, Muffled, decreased, heart sounds, Neck swelling, Neck weakness, Oily skin, hair or feathers, greasy, Polydipsia, Polyphagia, Polyuria, Propulsion, Retinal detachment, Retinal hemorrhage, Rough hair coat, Second degree atrioventricular heart block, Seizures or syncope, Sneezing, Steatorrhea, fatty stools, feces, Subcutaneous crepitation, Sudden death, Tachycardia, Trembling, Tremor, Underweight, poor condition, thin, emaciated, unthriftiness, ill thrift, Unusual or foul odor, stools, feces, Ventricular enlargement, Ventricular premature beat, Vomiting or regurgitation, Weak pulse, Weight loss
 
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