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Location. The majority of parathyroid adenomas are juxtathyroid and located immediately posterior or inferior to the thyroid gland. Superior gland parathyroid adenoma may fall posteriorly in the tracheo-oesophageal groove or para-oesophageal location or even fall inferior as far as the mediastinum 12.Up to 5% of parathyroid adenomas can occur in ectopic locations. Common ectopic locations include 1,12 1  : mediastinum.uperior gland parathyroid adenoma may fall posteriorly in the tracheo-oesophageal groove or para-oesophageal location or even fall inferior as far as the mediastinum 12. Up to 5% of parathyroid adenomas can occur in ectopic locations. Common ectopic locations include 1,12 :
Written by James Norman MD, FACS, FACE. Parathyroid glands are small glands of the endocrine system that are located behind the thyroid. There are four parathyroid glands which are normally about the size and shape of a grain of rice.They are shown in this picture as the mustard yellow glands behind the pink thyroid gland.This is their normal color.ritten by James Norman MD, FACS, FACE. Parathyroid glands are small glands of the endocrine system that are located behind the thyroid. There are four parathyroid glands which are normally about the size and shape of a grain of rice.