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Cancers that are known collectively as head and neck cancers usually begin in the squamous cells that line the moist, mucosal surfaces inside the head and neck (for example, inside the mouth, the nose, and the throat). These squamous cell cancers are often referred to as squamous cell carcinomas of the head and neck. Head and neck cancers can also begin in the salivary glands, but salivary gland cancers are relatively uncommon. Salivary glands contain many different types of cells that can become cancerous, so there are many different types of salivary gland cancer. Cancers of the head and neck are further categorized by the area of the head or neck in which they begin. These areas are described below:- 1. Oral Cavity: Includes 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 the gum behind the wisdom teeth. 2. Pharynx: The pharynx (throat) is a hollow tube about 5 inches long that starts behind the nose and leads to the esophagus. It has three parts: the nasopharynx (the upper part of the pharynx, behind the nose); the oropharynx (the middle part of the pharynx, including the soft palate [the back of the mouth], the base of the tongue, and the tonsils); the hypopharynx (the lower part of the pharynx). 3. Larynx: The larynx, also called the voicebox, is a short passageway formed by cartilage just below the pharynx in the neck. The larynx contains the vocal cords. It also has a small piece of tissue, called the epiglottis, which moves to cover the larynx to prevent food from entering the air passages. 4. Paranasal sinuses and nasal cavity: The paranasal sinuses are small hollow spaces in the bones of the head surrounding the nose. The nasal cavity is the hollow space inside the nose. 5. Salivary glands: The major salivary glands are in the floor of the mouth and near the jawbone. The salivary glands produce saliva.

Tumors of soft tissue are more common than bone tumors. They can occur almost anywhere: within and between muscles, ligaments, nerves and blood vessels. These tumors vary widely in how they look and behave. Some can be quite aggressive. The more the tumor has invaded nearby tissues, the harder it is to completely remove. This, in turn, increases the chances that the tumor will come back. A sarcoma is a type of cancer that develops from certain tissues, like bone or muscle. Bone and soft tissue sarcomas are the main types of sarcoma. Soft tissue sarcomas can develop from soft tissues like fat, muscle, nerves, fibrous tissues, blood vessels, or deep skin tissues. They can be found in any part of the body. Most of them develop in the arms or legs. They can also be found in the trunk, head and neck area, internal organs, and the area in back of the abdominal cavity (known as the retroperitoneum). Symptoms Signs of a benign soft tissue tumor vary widely. If they are close to the surface of the body, they may appear as a lump. Some cause pain; others don't. They vary widely in how they look as well. If you have pain or if the tumor grows, you should see a doctor. 1. Lipomas, benign tumors composed of fatty tissue 2. Angiolipoma 3. Benign fibrous histiocytoma 4. Neurofibroma 5. Schwannomas 6. Hemangiomas, noncancerous tumors that are formed by a mass of blood cells. The tumor rarely become malignant, and can be successfully excised. They often result from trauma to the affected part. 7. Benign fibrous histiocytoma Smoking: Smoking tobacco is an important risk factor for kidney cancer. People who smoke have a higher risk than nonsmokers. The risk is higher for those who smoke more cigarettes or for a long time. High blood pressure: Having high blood pressure may increase the risk of kidney cancer.

Brain cancer is an overgrowth of cells in your brain that forms masses called tumors. Cancerous, or malignant, brain tumors tend to grow very quickly. They disrupt the way your body works, and this can be life-threatening. However, brain cancer is quite uncommon Primary brain cancer develops from cells within the brain. Part of the central nervous system (CNS), the brain is the control center for vital functions of the body, including speech, movement, thoughts, feelings, memory, vision, hearing and more. Common brain cancer symptoms include:- 1. Headaches that are usually worse in the morning 2. Nausea 3. Vomiting 4. A lack of coordination 5. A lack of balance 6. Difficulty walking 7. Memory lapses 8. Difficulty thinking 9. Speech problems 10. Vision problems 11. Personality changes 12. Abnormal eye movements 13. Muscle jerking Cancer is named based on where in your body it begins. Brain cancer begins in your brain. This is sometimes referred to as primary brain cancer. You can also have cancer that has spread to your brain after starting somewhere else in your body. This is called metastatic brain cancer. Cancerous tumors in the brain are typically metastatic and not due to primary brain cancer.