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Parathyroid carcinoma is a rare cause of primary hyperparathyroidism and commonly metastasize to lymph node, lung, liver, and bone. In Korea, there has been no report of distant metastasis in parathyroid carcinoma except for one case of pulmonary metastasis. A 58-year-old man presenting with weakness, nausea, and a palpable thyroid nodule visited our hospital. Elevated serum calcium and parathyroid hormone (PTH) concentration allowed the diagnosis of hyperparathyroidism. Two discrete masses were identified by neck ultrasound scan, computed tomography (CI') and Tc-Sestamibi scan in the left lobe of thyroid gland and ipsilateral parathyroid gland. So multiple endocrine neoplasia (MEN) type 2A" was suspected initially, but postoperative histological diagnosis was left parathyroid carcinoma with solitary nodular lesion invading left thyroid gland. He was successfully treated with left parathyroidectomy and left thyroid lobectomy.