After a child catches a cold, be cautious and guard against otitis media!

Head and neck cancer is a collective term for cancers that occur in various upper respiratory tract tissues. Depending on the site of occurrence, it can be divided into oral cancer, nasopharyngeal cancer, oropharyngeal cancer, hypopharyngeal cancer, and laryngeal cancer. The most common tumour type in head and neck cancer is squamous cell carcinoma, which originates from squamous cells on the mucosal surface of the head and neck. According to medical research, some head and neck cancers are associated with HPV (human papillomavirus).

Nasopharyngeal cancer is one of the top ten cancers in Hong Kong that cannot be ignored. There are 600 to 800 cases of nasopharyngeal cancer in the city every year. Unlike many other cancers, nasopharyngeal cancer tends to occur at a relatively early age, with the peak incidence between 40 and 60 years old, considered the prime of one's life. The incidence rate is almost three times higher in males than in females. Compared to Western countries, nasopharyngeal cancer is more commonly found in Southern China.

The "oral" region comprises multiple sites, including the lips, tongue, floor of the mouth, hard palate, and gums, as well as the oral mucosa, buccal mucosa, and salivary glands. Any malignant tumour growing in these locations is collectively referred to as oral cancer, which is also one of the types of head and neck cancer.