In a startling revelation, a recent study has uncovered that a significant number of dogs may be wrongly diagnosed and treated for hypothyroidism, a condition characterized by an underactive thyroid gland. This research, involving 102 client-owned dogs from seven veterinary practices, aimed to shed light on the accuracy of hypothyroidism diagnoses in everyday clinical settings.

Experts from the European College of Veterinary Internal Medicine analyzed the cases, categorizing each diagnosis into one of four assessments: confirmed or likely hypothyroid, suspected but not confirmed, considered unlikely, and no reason to suspect hypothyroidism at all. Alarmingly, the findings suggested a wide disparity in clinical opinions, with one clinician finding over half of the dogs evaluated (52%) had no reason to be suspected of hypothyroidism, while others flagged a considerable portion of the cases as misdiagnosed.

Furthermore, the consensus among these specialists highlighted a concerning trend: nearly half to over half of the dogs receiving levothyroxine, a common thyroid hormone replacement therapy, might not need it at all. This raises critical questions about the current diagnostic practices and emphasizes the need for more stringent criteria before commencing treatment.

This study underscores a pressing issue in veterinary medicine: the potential overdiagnosis of hypothyroidism in dogs. It calls for a more cautious approach, recommending thyroid function tests only for dogs with a high likelihood of the disease, to prevent unnecessary treatment and ensure our furry friends receive the accurate care they deserve.

Read full article here: https://onlinelibrary.wiley.com/doi/10.1111/jvim.16993