Hyperthyroidism is the most common endocrine disease in older cats. While medical management is widely used, surgical removal of the affected thyroid tissue offers a potential cure with good welfare outcomes.
Untreated hyperthyroidism causes significant suffering through chronic weight loss, cardiovascular disease, and secondary kidney damage. Treatment significantly improves quality of life. Choosing the most appropriate treatment method - medical, surgical, or radioiodine - requires careful consideration of individual cat health, owner circumstances, and geographic availability.