Silent intrathyroid parathyroid carcinoma.

Parathyroid cancer is a rare disease that may be asymptomatic. Intrathyroidal localization of parathyroid carcinoma is casuistic and challenging for diagnosis, and the treatment strategy is not well defined. Preoperative parathyroid hormone and serum calcium testing are recommended for patients with solid thyroid nodules (Bethesda IV-V).