ENT anatomy and areas affected by ENT cancer. There are 4 zones, in red, the sinuses, nasal, oral cavity, and larynx, in blue the nasopharynx, in dark green the oropharynx, in light green the hypopharynx. The majority of cancers called head and neck cancers are squamous cell carcinomas. This image cannot be sold in Belgium for use by a pharmaceutical company. - Restriction : Exclusive to pharmaceutical laboratories in Belgium. from 01/25/2020