چکیده (انگلیسی):

Parathyroid carcinoma is a rare disease of unknown etiology. This study presents a
case of parathyroid carcinoma in a patient with tertiary hyperparathyroidism. Despite a successful
kidney transplantation, the intact parathyroid hormone (iPTH) level of the patient
was elevated consistently and could not be controlled by medical therapy. Due to the development
of tertiary hyperparathyroidism with bone pain and osteoporosis, subtotal parathyroidectomy
was performed 4 months after the kidney transplantation. Histological
evaluation revealed that one of four parathyroid lesions was a parathyroid carcinoma, while
the others were diffuse hyperplasia. Postoperative laboratory studies indicated a decreased
level of iPTH. A positron emission tomographyecomputed tomography performed 6 months after
the operation revealed no evidence of local recurrence or distant metastasis.