Registers based in general practice are essential in long term surveillance

EDITOR,—The consensus statement for good practice and audit measures in the management of hypothyroidism and hyperthyroidism recommends surveillance of patients at high risk of iatrogenic hypothyroidism and suggests this as a point for future audit.1 We have recently audited the follow up of thyrotoxicosis and thyroidectomy in a general practice population of 10 761 patients. Previously we did not have a systematic method of surveillance for such patients but checked their thyroid function opportunistically. Our audit …