Giant Ectopic Parathyroid Adenoma Arising in the Posterior Mediastinum. Report of Case and a Review.

We present a case of a greatly enlarged giant ectopic parathyroid adenoma that weighed 43 grams, which was located in the posterior mediastinum of a 74-year-old man. The patient presented with generalized weakness and decreased level of consciousness. He was found to have elevated level of serum calcium (19.