Expectorated tissue leading to diagnosis of renal adenocarcinoma.

Metastatic tumour to the tongue is extremely rare. We report a case of renal adenocarcinoma metastasis involving the right side of the base of the tongue with extension to the right vallecula in a 59-year-old man in which a piece of the metastatic lesion in the tongue was expectorated and was the first evidence of the primary tumour in the right kidney. Previously reported cases are reviewed.