Head and neck conditions refer mainly to tumours that affect the head and neck areas including the nose and sinuses, the nasopharynx (area behind the nose just above the mouth and throat), the oral cavity (mouth), the thyroid glands (below the voice box), the oropharynx (throat), the larynx (voice box), the hypopharynx (inlet into the throat) and the salivary gland. These tumours can be benign (non-cancerous) or malignant (cancerous). Anyone with neck lumps should have them seen to by a doctor.