What is head and neck cancer?

What is cancer?

Organs are formed by a collection of cells which divide themselves regularly to replace those that die.

This process of cell division in regulated by mechanisms that, when altered, cause cells and their descendents to start an uncontrolled overactive division, thus invading surrounding tissues and organs (infiltration) and even moving and growing someplace else in the organism (metastasis) forming a malignant tumour or nodule called cancer or neoplasm.

A cancer may grow:

  • Locally, invading neighbour tissues cells
  • Spreading through the lymphatic ganglia
  • Spreading through the blood vessels