Metastatic hypernephroma to the head and neck.

Hypernephroma is one of the most common visceral adenocarcinomas which metastasize to the head and neck. The metastasis may precede discovery of the primary or follow it. The most common sites of metastatic hypernephroma to the head and neck are the sinonasal tract, skin, cervical lymphatics, and mandible. Three cases of metastatic hypernephroma are presented and one of these is the first documented report of a metastasis to the parotid gland. The other two were found in the sinonasal tract.