The primary rationale for screening asymptomatic patients is that the resulting treatment leads to improved health outcomes when compared with patients who are not screened. There is insufficient evidence available indicating that screening for thyroid diseases will have these results.
Sources:
Government of Canada. Screening for thyroid disorders and thyroid cancer in asymptomatic adults in The Canadian guide to clinical preventive health care [Internet]. 1994 [cited 2017 Aug 11].
Management of thyroid dysfunction in adults [Internet]. BPJ. 2010;33 [cited 2017 Aug 11].
Surks MI, et al. Subclinical thyroid disease: scientific review and guidelines for diagnosis and management. JAMA. 2004 Jan 14;291(2):228-38. PMID: 14722150.
U.S. Preventive Services Task Force. Screening for thyroid disease: recommendation statement. Ann Intern Med. 2004 Jan 20;140(2):125-7. PMID: 14734336.