Another study mainly assessed the frequencies of serum gastric parietal cell antibody (GPCA), thyroglobulin antibody (TGA), and thyroid microsomal antibody (TMA) positivities in 30 atrophic glossitis (AG)-positive RAS/BD (AGþRAS/BD) and 33 AG-negative RAS/BD (AG־RAS/BD) patients. Here, TG is linked to thyroiditis.