Introduction: Parathyroid carcinoma is a rare malignant endocrine tumor that is usually associated with primary hyperparathyroidism. The coexistence of parathyroid carcinoma and renal hyperparathyroidism is a rare phenomenon. Hence. we present a case of parathyroid carcinoma in a patient with tertiary hyperparathyroidism. https://www.kvmrentals.com/product-category/intelligent-systems/