Case report: incidental parathyroid adenoma in a Chinese diabetic patient with hypercalcemia and normal parathyroid hormone levels

We report a case of hypercalcemia with normal PTH levels due to a parathyroid adenoma. Patient concerns: A 52-year-old female patient presented with 2-year history of documented sustained high-normal serum calcium and hypercalcemia (2.51–3.03 mmol/L) with normal serum intact PTH levels (21.95–40.15 pg/ mL). Diagnoses: A parathyroid tumor was localized by ultrasonography and 99mTc-sestamibi dual-phase fusion imaging with single-photon emission computed tomography/computed tomography. Interventions: Parathyroidectomy was performed to excise the tumor completely. Outcomes: A 1.2-cm-sized parathyroid adenoma was removed surgically. The serum calcium was declined to normal level immediately after resection, as well as in 4- month follow-ups. The immunohistological diagnosis proved to be a PTH positive parathyroid adenoma. Lessons: In case of hypercalcemia, serum intact PTH and parathyroid imaging should be monitored to evaluate the presence of parathyroid adenoma with care because PHPT could present with inappropriate normal PTH.
Source: Medicine - Category: Internal Medicine Tags: Research Article: Clinical Case Report Source Type: research