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Stages of Nasopharyngeal Cancer
What Are the Stages of Nasopharyngeal Cancer?
Staging is the process of determining whether cancer has spread and, if so, how far. It is important to know the stage of the disease in order to plan treatment.
Stages of nasopharyngeal cancer
In stage 0, abnormal cells are found in the lining of the nasopharynx. These abnormal cells may become cancer and spread into nearby normal tissue. Stage 0 is also called carcinoma in situ.
In stage 1, cancer has formed and the cancer:
- Is found in the nasopharynx only; or
- Has spread from the nasopharynx to the oropharynx and/or to the nasal cavity.
The oropharynx is the middle part of the throat and includes the soft palate, the base of the tongue, and the tonsils.
In stage 2 nasopharyngeal cancer, the cancer:
- Is found in the nasopharynx only or has spread from the nasopharynx to the oropharynx and/or to the nasal cavity. Cancer has spread to one or more lymph nodes on one side of the neck and/or to lymph nodes behind the pharynx. The affected lymph nodes are 6 centimeters or smaller; or
- Is found in the parapharyngeal space. Cancer may have spread to one or more lymph nodes on one side of the neck and/or to lymph nodes behind the pharynx. The affected lymph nodes are 6 centimeters or smaller.
The oropharynx is the middle part of the throat and includes the soft palate, the base of the tongue, and the tonsils. The parapharyngeal space is a fat-filled, triangular area near the pharynx, between the base of the skull and the lower jaw.
In stage 3 nasopharyngeal cancer, the cancer:
- Is found in the nasopharynx only or has spread from the nasopharynx to the oropharynx and/or to the nasal cavity. Cancer has spread to one or more lymph nodes on both sides of the neck. The affected lymph nodes are 6 centimeters or smaller; or
- Is found in the parapharyngeal space. Cancer has spread to one or more lymph nodes on both sides of the neck. The affected lymph nodes are 6 centimeters or smaller; or
- Has spread to nearby bones or sinuses. Cancer may have spread to one or more lymph nodes on one or both sides of the neck and/or to lymph nodes behind the pharynx. The affected lymph nodes are 6 centimeters or smaller.
The oropharynx is the middle part of the throat and includes the soft palate, the base of the tongue, and the tonsils. The parapharyngeal space is a fat-filled, triangular area near the pharynx, between the base of the skull and the lower jaw.
Stage 4 nasopharyngeal cancer is divided into stages IVA, IVB, and IVC.
- Stage IVA: Cancer has spread beyond the nasopharynx and may have spread to the cranial nerves, the hypopharynx (bottom part of the throat), areas in and around the side of the skull or jawbone, and/or the bone around the eye. Cancer may also have spread to one or more lymph nodes on one or both sides of the neck and/or to lymph nodes behind the pharynx. The affected lymph nodes are 6 centimeters or smaller.
- Stage IVB: Cancer has spread to lymph nodes between the collarbone and the top of the shoulder and/or the affected lymph nodes are larger than 6 centimeters.
- Stage IVC: Cancer has spread beyond nearby lymph nodes to other parts of the body.
Recurrent nasopharyngeal cancer is cancer that has recurred (come back) after it has been treated. The cancer may come back in the nasopharynx or in other parts of the body.
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