PTH and adenoma: Parathyroid tumors are rare endocrine neoplasms affecting 0.1–0.3% of the general population [2], comprising slow-growing benign PTH-secreting adenomas in almost 100% of cases, atypical parathyroid adenomas in about 1.2–1.3% of cases, and extremely rare malignant carcinoma in less than 1% of cases [3].