Follicular carcinoma in lingual thyroid presenting as a latero-cervical mass. Case report and review of the literature.

A follicular carcinoma arising in a lingual thyroid and presenting as a submandibular mass is reported. The tumor showed a mixture of solid sheets of follicular cells and well-formed follicles displaying variable levels of cytological atypia. True vascular invasion was confirmed. To the best of our knowledge, this is the first example of carcinoma arising in lingual thyroid that presented as a latero-cervical mass.