Given the presence of a characteristic half-life of thyroid disease, a hormonal study was requested, finding primary hyperthyroidism of autoimmune origin with T4L (T4L) levels: T4L (0.860-2.760 IU), anti-TSHb (0.475) antibodies (0.75 IU/ml) and T4L): 0.008, T4L, T4L) and T4L parameters: 0.008, T4L, T4