Cervical Lymph Node Involvement by Medullary Carcinoma of Unknown Origin; a Rare Presentation

Abstract

Medullary thyroid carcinoma (MTC), comprising 5-10% of all cancers, is a rare malignancy which frequently spreads to cervical lymph nodes. Occurring in both the sporadic and familial forms, the latter accounts for 20-25% of cases, while the former is considered the most frequent type. We report a case of metastatic MTC presented with cervical lymphadenopathy in a patient without evidences of MTC in thyroid gland.