Concomitant bilateral papillary thyroid carcinoma and parathyroid adenoma

Thyroid malignant neoplasms are the most prevalent cancer of the endocrine system, and their concurrence with parathyroid neoplasms is extremely rare. We report a 69-year-old woman presenting with hypercalcemia and thyroid nodule, which histologic examination revealed bilateral papillary thyroid carcinoma with different variants coincident with parathyroid adenoma. Awareness of concomitant parathyroid and thyroid diseases may help manage patients with hypercalcemia history. So, we recommended a preoperative calcium check in a patient with a thyroid nodule.