Paranasal sinus and nasal cavity cancer is a disease in which malignant (cancer) cells form in the tissues of the paranasal sinuses and nasal cavity."Paranasal" means near the nose. The paranasal sinuses are hollow, air-filled spaces in the bones around the nose. The sinuses are lined with cells that make mucus, which keeps the inside of the nose from drying out during breathing.
There are several paranasal sinuses named after the bones that surround them:
- The frontal sinuses are in the lower forehead above the nose.
- The maxillary sinuses are in the cheekbones on either side of the nose.
- The ethmoid sinuses are beside the upper nose, between the eyes.
- The sphenoid sinuses are behind the nose, in the center of the skull.
Different types of cells in the paranasal sinus and nasal cavity may become malignant.The most common type of paranasal sinus and nasal cavity cancer is squamous cell carcinoma. This type of cancer forms in the squamous cells (thin, flat cells) lining the inside of the paranasal sinuses and the nasal cavity. Other types of paranasal sinus and nasal cavity cancer include the following:
- Melanoma: Cancer that starts in cells called melanocytes, the cells that give skin its natural color.
- Inverting papilloma: Benign tumors that form inside the nose. A small number of these change into cancer.
- Midline granulomas: Cancer of tissues in the middle part of the face.
Being exposed to certain chemicals or dust in the workplace can increase the risk of paranasal sinus and nasal cavity cancer.Anything that increases your chance of getting a disease is called a risk factor. Having a risk factor does not mean that you will get cancer; not having risk factors doesn’t mean that you will not get cancer. Talk with your doctor if you think you may be at risk. Risk factors for paranasal sinus and nasal cavity cancer include the following:
- Being exposed to certain workplace chemicals or dust, such as those found in the following jobs:
- Sawmill work.
- Woodworking (carpentry).
- Flour mill or bakery work.
- Being infected with human papillomavirus (HPV).
- Being male and older than 40 years.
Possible signs of paranasal sinus and nasal cavity cancer include sinus problems and nosebleeds.These and other symptoms may be caused by paranasal sinus and nasal cavity cancer. Other conditions may cause the same symptoms. There may be no symptoms in the early stages. Symptoms may appear as the tumor grows. Check with your doctor if you have any of the following problems:
- Blocked sinuses that do not clear, or sinus pressure.
- Headaches or pain in the sinus areas.
- A runny nose.
- A lump or sore inside the nose that does not heal.
- A lump on the face or roof of the mouth.
- Numbness or tingling in the face.
- Swelling or other trouble with the eyes, such as double vision or the eyes pointing in different directions.
- Pain in the upper teeth, loose teeth, or dentures that no longer fit well.
- Pain or pressure in the ear.
Tests that examine the sinuses and nasal cavity are used to detect (find) and diagnose paranasal sinus and nasal cavity cancer.The following tests and procedures may be used:
- Physical exam and history: An exam of the body to check general signs of health, including checking for signs of disease, such as lumps or anything else that seems unusual. A history of the patient’s health habits and past illnesses and treatments will also be taken.
- X-rays of the head and neck: 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.
- MRI (magnetic resonance imaging): A procedure that uses a magnet, radio waves, and a computer to make a series of detailed pictures of areas inside the body. This procedure is also called nuclear magnetic resonance imaging (NMRI).
- Biopsy: The removal of cells or tissues so they can be viewed under a microscope by a pathologist to check for signs of cancer. There are three types of biopsy:
- Fine-needle aspiration (FNA) biopsy: The removal of tissue or fluid using a thin needle.
- Incisional biopsy: The removal of part of an area of tissue that doesn’t look normal.
- Excisional biopsy: The removal of an entire area of tissue that doesn’t look normal.
- Nasoscopy: A procedure to look inside the nose for abnormal areas. A nasoscope is inserted into the nose. A nasoscope is a thin, tube-like instrument with a light and a lens for viewing. A special tool on the nasoscope may be used to remove samples of tissue. The tissues samples are viewed under a microscope by a pathologist to check for signs of cancer.
Certain factors affect prognosis (chance of recovery) and treatment options.The prognosis (chance of recovery) and treatment options depend on the following:
- Where the tumor is in the paranasal sinus or nasal cavity and whether it has spread.
- The size of the tumor.
- The type of cancer.
- Whether the cancer has just been diagnosed or has recurred (come back).