Co-existence of Papillary and Medullary Thyroid Carcinoma: Reports of Three Cases.

Medullary thyroid carcinoma (MTC) and papillary thyroid carcinoma (PTC) are two different types of thyroid carcinoma. They have different features in terms of cellular origin, histopathology, clinical features, prevalence, and prognosis. PTC originates from follicular cells, while MTC from parafollicular cells.

Control of Refractory Hypercalcemia with Denosumab in a Case of Metastatic Parathyroid Carcinoma.

Parathyroid carcinoma is a rare cause of hyperparathyroidism and leads to severe hypercalcemia. The etiology is not fully known. Parathyroid cancer should be considered in the differential diagnosis, if serum calcium and parathyroid hormone levels increase, and parathyroid gland is palpable.