Parathyroid adenoma most commonly involves which of the following site: (A) Thyroid substance, (B) Superior parathyroid lobe, (C) Inferior parathyroid lobe, (D) In the mediastinum
Answer is C. Adenomas are most often located in the inferior parathyroid glands, but in 6-10% of patients, parathyroid adenomas may be located in the thymus, the thyroid, the pericardium, or behind the esophagus.