Key Points for This Section

After paranasal sinus and nasal cavity cancer has been diagnosed, tests are done to find out if cancer cells have spread within the paranasal sinuses and nasal cavity or to other parts of the body. There is no standard staging system for cancer of the sphenoid and frontal sinuses. The following stages are used for maxillary sinus cancer: Stage 0 (Carcinoma in Situ) Stage I Stage II Stage III Stage IV The following stages are used for nasal cavity and ethmoid sinus cancer: Stage 0 (Carcinoma in Situ) Stage I Stage II Stage III Stage IV

After paranasal sinus and nasal cavity cancer has been diagnosed, tests are done to find out if cancer cells have spread within the paranasal sinuses and nasal cavity or to other parts of the body.

The process used to find out if cancer has spread within the paranasal sinuses and nasal cavity or to other parts of the body is called staging. The information gathered from the staging process determines the stage of the disease. It is important to know the stage in order to plan treatment. The following tests and procedures may be used in the staging process:

• X-rays of the head, neck, and chest: An x-ray is a type of energy beam that can go through the body and onto film, making a picture of areas inside the body.
• Endoscopy: A procedure to look at organs and tissues inside the body to check for abnormal areas. An endoscope is inserted through an opening in the body, such as the nose or mouth. An endoscope is a thin, tube-like instrument with a light and a lens for viewing. It may also have a tool to remove tissue or lymph node samples, which are checked under a microscope for signs of disease.
• CT scan (CAT scan): A procedure that makes a series of detailed pictures of areas inside the body, taken from different angles. The pictures are made by a computer linked to an x-ray machine. A dye may be injected into a vein or swallowed to help the organs or tissues show up more clearly. This procedure is also called computed tomography, computerized tomography, or computerized axial tomography.
• MRI (magnetic resonance imaging) with gadolinium: A procedure that uses a magnet, radio waves, and a computer to make a series of detailed pictures of areas inside the body. Sometimes a substance called gadolinium is injected into a vein. The gadolinium collects around the cancer cells so they show up brighter in the picture. This procedure is also called nuclear magnetic resonance imaging (NMRI).
• Bone scan: A procedure to check if there are rapidly dividing cells, such as cancer cells, in the bone. A very small amount of radioactive material is injected into a vein and travels through the bloodstream. The radioactive material collects in the bones and is detected by a scanner.

There is no standard staging system for cancer of the sphenoid and frontal sinuses.

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Pea, peanut, walnut, and lime show tumor sizes.

The following stages are used for maxillary sinus cancer:

Stage 0 (Carcinoma in Situ)

In stage 0, abnormal cells are found in the innermost lining of the maxillary sinus. These abnormal cells may become cancer and spread into nearby normal tissue. Stage 0 is also called carcinoma in situ.

Stage I

In stage I, cancer has formed in the mucous membranes of the maxillary sinus.

Stage II

In stage II, cancer has spread to bone around the maxillary sinus, including the roof of the mouth and the nose, but not to bone at the back of the maxillary sinus or the base of the skull.

Stage III

In stage III, cancer has spread to any of the following:

• Bone at the back of the maxillary sinus.
• Tissues under the skin.
• The eye socket.
• The base of the skull.
• The ethmoid sinuses.

or

Cancer has spread to one lymph node on the same side of the neck as the cancer and the lymph node is 3 centimeters or smaller. Cancer has also spread to any of the following:

• The lining of the maxillary sinus.
• Bones around the maxillary sinus, including the roof of the mouth and the nose.
• Tissues under the skin.
• The eye socket.
• The base of the skull.
• The ethmoid sinuses.

Stage IV

Stage IV is divided into stage IVA, IVB, and IVC.

Stage IVA

In stage IVA, cancer has spread either:

• to one lymph node on the same side of the neck as the cancer and the lymph node is larger than 3 centimeters but not larger than 6 centimeters; or
• to more than one lymph node anywhere in the neck, and they are all 6 centimeters or smaller;

and cancer has spread to any of the following:

• The lining of the maxillary sinus.
• Bones around the maxillary sinus, including the roof of the mouth and the nose.
• Tissues under the skin.
• The eye socket.
• The base of the skull.
• The ethmoid sinuses.

or

Cancer has spread to any of the following:

• The front of the eye.
• The skin of the cheek.
• The base of the skull.
• Behind the jaw.
• The bone between the eyes.
• The sphenoid or frontal sinuses.

and cancer may also have spread to one or more lymph nodes 6 centimeters or smaller, anywhere in the neck.

Stage IVB

In stage IVB, cancer has spread to any of the following:

• The back of the eye.
• The brain.
• The middle parts of the skull.
• The nerves in the head that go to the brain.
• The upper part of the throat behind the nose.
• The base of the skull.

and cancer may be found in one or more lymph nodes of any size, anywhere in the neck.

or

Cancer is found in a lymph node larger than 6 centimeters. Cancer may also be found anywhere in or near the maxillary sinus.

Stage IVC

In stage IVC, cancer may be anywhere in or near the maxillary sinus, may have spread to lymph nodes, and has spread to organs far away from the maxillary sinus, such as the lungs.

The following stages are used for nasal cavity and ethmoid sinus cancer:

Stage 0 (Carcinoma in Situ)

In stage 0, abnormal cells are found in the innermost lining of the nasal cavity or ethmoid sinus. These abnormal cells may become cancer and spread into nearby normal tissue. Stage 0 is also called carcinoma in situ.

Stage I

In stage I, cancer has formed and is found in only one area (of either the nasal cavity or the ethmoid sinus) and may have spread into bone.

Stage II

In stage II, cancer is found in two areas (of either the nasal cavity or the ethmoid sinus) that are near each other or has spread to an area next to the sinuses. Cancer may also have spread into bone.

Stage III

In stage III, cancer has spread to any of the following:

• The eye socket.
• The maxillary sinus.
• The roof of the mouth.
• The bone between the eyes.

or

Cancer has spread to one lymph node on the same side of the neck as the cancer and the lymph node is 3 centimeters or smaller. Cancer has also spread to any of the following:

• The nasal cavity.
• The ethmoid sinus.
• The eye socket.
• The maxillary sinus.
• The roof of the mouth.
• The bone between the eyes.

Stage IV

Stage IV is divided into stage IVA, IVB, and IVC.

Stage IVA

In stage IVA, cancer has spread either:

• to one lymph node on the same side of the neck as the cancer and the lymph node is larger than 3 centimeters but not larger than 6 centimeters; or
• to more than one lymph node anywhere in the neck, and they are all 6 centimeters or smaller;

and cancer has spread to any of the following:

• The nasal cavity.
• The ethmoid sinus.
• The eye socket.
• The maxillary sinus.
• The roof of the mouth.
• The bone between the eyes.

or

Cancer has spread to any of the following:

• The front of the eye.
• The skin of the nose or cheek.
• Front parts of the skull.
• The base of the skull.
• The sphenoid or frontal sinuses.

and cancer may have spread to one or more lymph nodes 6 centimeters or smaller, anywhere in the neck.

Stage IVB

In stage IVB, cancer has spread to any of the following:

• The back of the eye.
• The brain.
• The middle parts of the skull.
• The nerves in the head that go to the brain.
• The upper part of the throat behind the nose.
• The base of the skull.

and cancer may be found in one or more lymph nodes of any size, anywhere in the neck.

or

Cancer is found in a lymph node larger than 6 centimeters. Cancer may also be found anywhere in or near the nasal cavity and ethmoid sinus.

Stage IVC

In stage IVC, cancer may be anywhere in or near the nasal cavity and ethmoid sinus, may have spread to lymph nodes, and has spread to organs far away from the nasal cavity and ethmoid sinus, such as the lungs.

Glossary Terms

Not normal. An abnormal lesion or growth may be cancerous, premalignant (likely to become cancer), or benign.

A technique to create images of bones on a computer screen or on film. A small amount of radioactive material is injected into a blood vessel and travels through the bloodstream; it collects in the bones and is detected by a scanner.

A term for diseases in which abnormal cells divide without control. Cancer cells can invade nearby tissues and can spread to other parts of the body through the blood and lymph systems. There are several main types of cancer. Carcinoma is cancer that begins in the skin or in tissues that line or cover internal organs. Sarcoma is cancer that begins in bone, cartilage, fat, muscle, blood vessels, or other connective or supportive tissue. Leukemia is cancer that starts in blood-forming tissue such as the bone marrow, and causes large numbers of abnormal blood cells to be produced and enter the blood. Lymphoma and multiple myeloma are cancers that begin in the cells of the immune system. Central nervous system cancers are cancers that begin in the tissues of the brain and spinal cord.

A group of abnormal cells that remain in the tissue in which they first formed. These abnormal cells may become cancer and spread into nearby normal tissue.

A hollow area or hole. It may describe a body cavity (such as the space within the abdomen) or a hole in a tooth caused by decay.

The individual unit that makes up the tissues of the body. All living things are made up of one or more cells.

A measure of length in the metric system. There are 100 centimeters in a meter and 2½ centimeters in an inch.

A dye or other substance that helps show abnormal areas inside the body. It is given by injection into a vein, by enema, or by mouth. Contrast material may be used with x-rays, CT scans, MRI, or other imaging tests.

Computed tomography scan. A series of detailed pictures of areas inside the body taken from different angles; the pictures are created by a computer linked to an x-ray machine. Also called computed tomography scan, computerized tomography, computerized axial tomography scan, and CAT scan.

A thin, tube-like instrument used to look at tissues inside the body. An endoscope has a light and a lens for viewing and may have a tool to remove tissue.

A procedure that uses an endoscope to examine the inside of the body. An endoscope is a thin, tube-like instrument with a light and a lens for viewing. It may also have a tool to remove tissue to be checked under a microscope for signs of disease.

A type of paranasal sinus (a hollow space in the bones around the nose). Ethmoid sinuses are found in the spongy ethmoid bone in the upper part of the nose between the eyes. They are lined with cells that make mucus to keep the nose from drying out.

A type of paranasal sinus (a hollow space in the bones around the nose). There are two, large frontal sinuses in the frontal bone, which forms the lower part of the forehead and reaches over the eye sockets and eyebrows. The frontal sinuses are lined with cells that make mucus to keep the nose from drying out.

Use of a syringe and needle to push fluids or drugs into the body; often called a "shot."

One of a pair of organs in the chest that supplies the body with oxygen, and removes carbon dioxide from the body.

A rounded mass of lymphatic tissue that is surrounded by a capsule of connective tissue. Lymph nodes filter lymph (lymphatic fluid), and they store lymphocytes (white blood cells). They are located along lymphatic vessels. Also called lymph gland.

A procedure in which radio waves and a powerful magnet linked to a computer are used to create detailed pictures of areas inside the body. These pictures can show the difference between normal and diseased tissue. MRI makes better images of organs and soft tissue than other scanning techniques, such as computed tomography (CT) or x-ray. MRI is especially useful for imaging the brain, the spine, the soft tissue of joints, and the inside of bones. Also called magnetic resonance imaging, nuclear magnetic resonance imaging, and NMRI.

The moist, inner lining of some organs and body cavities (such as the nose, mouth, lungs, and stomach). Glands in the mucous membrane make mucus (a thick, slippery fluid). Also called mucosa.

By or having to do with the nose.

A bundle of fibers that receives and sends messages between the body and the brain. The messages are sent by chemical and electrical changes in the cells that make up the nerves.

A part of the body that performs a specific function. For example, the heart is an organ.

One of many small hollow spaces in the bones around the nose. Paranasal sinuses are named after the bones that contain them: frontal (the lower forehead), maxillary (cheekbones), ethmoid (beside the upper nose), and sphenoid (behind the nose). The paranasal sinuses open into the nasal cavity (space inside the nose) and are lined with cells that make mucus to keep the nose from drying out during breathing.

Giving off radiation.

In medicine, an instrument that takes pictures of the inside of the body.

A type of paranasal sinus (a hollow space in the bones around the nose). There are two large sphenoid sinuses in the sphenoid bone, which is behind the nose between the eyes. The sphenoid sinuses are lined with cells that make mucus to keep the nose from drying out.

The extent of a cancer in the body. Staging is usually based on the size of the tumor, whether lymph nodes contain cancer, and whether the cancer has spread from the original site to other parts of the body.

Abnormal cells are found in the innermost lining of the maxillary sinus. These abnormal cells may become cancer and spread into nearby normal tissue.

Abnormal cells are found in the innermost lining of the nasal cavity or ethmoid sinus. These abnormal cells may become cancer and spread into nearby normal tissue.

Performing exams and tests to learn the extent of the cancer within the body, especially whether the disease has spread from the original site to other parts of the body. It is important to know the stage of the disease in order to plan the best treatment.

The hollow tube inside the neck that starts behind the nose and ends at the top of the trachea (windpipe) and esophagus (the tube that goes to the stomach). The throat is about 5 inches long, depending on body size. Also called the pharynx.

A group or layer of cells that work together to perform a specific function.

A blood vessel that carries blood to the heart from tissues and organs in the body.

A type of high-energy radiation. In low doses, x-rays are used to diagnose diseases by making pictures of the inside of the body. In high doses, x-rays are used to treat cancer.