Fig. 2From: Comparison of parathyroid hormone kinetics in endoscopic thyroidectomy via bilateral areola with open thyroidectomyDesign and intraoperative pictures of the dedicated localization scheme we used to describe the relationship between the parathyroid gland and the thyroid gland. Type A: parathyroid gland is tight, closely related to the thyroid gland. Type A is divided into three subtypes. a Type A1, parathyroid gland is attached to the surface of thyroid gland; b type A2, parathyroid gland partially or completely embedded in the thyroid gland, but located outside the inherent capsule of the thyroid; c type A3, the parathyroid gland is completely located in the thyroid tissue. d Type B is distant from the thyroid glandBack to article page