How do head and neck cancer develop?
Head and Neck Cancer Market |
Head and neck cancers typically begin in the squamous cells
that line the moist, mucosal surfaces of the head and neck (for example, inside
the mouth, the nose, and the throat). These squamous cell cancers are also
known as head and neck squamous cell carcinomas. Head and neck cancers can also
begin in the salivary glands, but these cancers are uncommon. Salivary glands
contain a wide range of cells that can develop into cancer, so there are
numerous types of salivary gland cancer.
According to the Coherent
Market Insights the Head
and Neck Cancer Market Global Industry Insights, Trends, Outlook, and
Opportunity Analysis, 2018-2026.
Cancers of the head and neck are further classified based on
where they begin in the head or neck. These regions of head and neck cancer are
described below and labelled in the image of head and neck cancer regions.
Oral cavity: The lips, the front two-thirds of the tongue,
the gums, the lining inside the cheeks and lips, the floor (bottom) of the
mouth under the tongue, the hard palate (bony top of the mouth), and the small
area of gum behind the wisdom teeth are all part of the oral cavity.
Pharynx: The pharynx (throat) is a 5 inch long hollow tube
that begins behind the nose and leads to the oesophagus. It is divided into
three sections: the nasopharynx (the upper part of the pharynx, behind the
nose); the oropharynx (the middle part of the pharynx, which includes the soft
palate [the back of the mouth], the base of the tongue, and the tonsils); and
the hypopharynx (the lower part of the pharynx) (the lower part of the
pharynx).
Larynx: The larynx, also known as the voicebox, is a short
passageway in the neck formed by cartilage just below the pharynx. The vocal
cords are housed in the larynx. It also has a small piece of tissue called the
epiglottis that moves to cover the larynx and keep food from entering the
airways.
Paranasal sinuses and nasal cavity: The paranasal sinuses
are tiny hollow spaces in the skull bones that surround the nose. The nasal
cavity is the space inside the nose that is hollow.
Salivary glands: The major salivary glands are located in
the mouth floor and near the jawbone. Saliva is produced by the salivary
glands.
Comments
Post a Comment