Clinical Research Directory

Inclusion Criteria: 1. Study group: Consecutive patients older than 18 years old with concomitant PHPT and DM who will undergo PTX. The indications and need for surgery will be independent from the research team. 2. Control group: Consecutive patients older than 18 years old with concomitant PHPT and DM who will not undergo PTX. The indications to forgo surgery will be independent from the research team. Exclusion Criteria: 1. Patients with recurrent or persistent PHPT will not be included. 2. Patients who are included but have evidence of recurrent or persistent PHPT based on six-month laboratory workup will be excluded from the final analysis (\<5% expected)9. 3. Patients with type 1 diabetes mellitus 4. Patients with secondary and/or tertiary hyperparathyroidism