A study from the French and Belgian GENEM study group’s MEN1 database [28] evaluated surgical trends and results of parathyroid surgery in 256 MEN1 patients with PHPT; data regarding bone status and bone mass were totally missing before and after the surgery, except for the biochemical markers of mineral metabolism directly related to parathyroid function, such as PTH and serum calcium. Here, PTH is linked to multiple endocrine neoplasia type 1.