TPO and autoimmune disease: Due to the high risk of relapse, and emerging risk of autoimmune diseases, the patient was advised to follow up outpatient for appropriate testing, including but not limited to antinuclear antibody (ANA), anti-thyroid peroxidase antibody (anti-TPO Ab), anti-thyroglobulin antibody (anti-TG Ab), thyroid ultrasound, and genetic susceptibility.