Thyroid function tests demonstrated suppressed thyroid-stimulating hormone (TSH; <0.01 mIU/L), elevated free thyroxine (free T4; >90 pmol/L), and positive thyroid-stimulating hormone receptor antibodies (TSH-receptor antibodies; 19.5), supporting a diagnosis of Graves' disease, while ultrasound and scintigraphy were consistent with the diagnosis. The gene discussed is TSHR; the disease is Graves disease.