VELSCOPE ORAL CANCER SCREENING

Understanding the causative factors of cancer will contribute to prevention of the disease. Age is frequently named as a risk factor for oral cancer, as historically it occurs in those over the age of 40. The age of diagnosed patients may indicate a time component in the biochemical or biophysical pDownload and rocesses of aging cells that allows malignant transformation, or perhaps, immune system competence diminishes with age. Very recent data (late 2007-2008) lead us to believe that the fastest growing segment of the oral cancer population are non smokers under the age of fifty, which would indicate a paradigm shift in the cause of the disease, and in the locations where it most frequently occurs in the oral environment.

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However, it is likely that the accumulative damage from other factors, such as tobacco use, alcohol consumption, and persistent viral infections such as HPV, are the real culprits. It may take several decades of smoking for instance, to precipitate the development of a cancer. Having said that, tobacco use in all its forms is number one on the list of risk factors in individuals over 50. Historically at least 75% of those diagnosed are tobacco users. This percentage is now changing, and has yet to be definitively determined as new data related to viral causes are changing the demographics rapidly. When you combine tobacco with heavy use of alcohol, your risk is significantly increased, as the two act synergistically. Those who both smoke and drink, have a 15 times greater risk of developing oral cancer than others. It does not appear that the viral causes act synergistically with tobacco or alcohol, and represent a completely unique disease process.

Tobacco and alcohol are essentially chemical factors, but they can also be considered lifestyle factors, since we have some control over them. Besides these, there are physical factors such as exposure to ultraviolet radiation. This is a causative agent in cancers of the lip, as well as other skin cancers. Cancer of the lip is one oral cancer whose numbers have declined in the last few decades. This is likely due to the increased awareness of the damaging effects of prolonged exposure to sunlight, and the use of sunscreens for protection. Another physical factor is exposure to x-rays. Radiographs regularly taken during examinations, and at the dental office, are safe, but remember that radiation exposure is accumulative over a lifetime. It has been implicated in several head and neck cancers.

Biological factors include viruses and fungi, which have been found in association with oral cancers. The human papilloma virus, particularly HPV16, has been implicated in oral cancers, particularly those that occur in the back of the mouth. (Oropharynx, base of tongue, tonsillar pillars and crypt, as well as the tonsils themselves.) HPV is a common, sexually transmitted virus, which infects about 40 million Americans today. There are over 100 strains of HPV, most thought to be harmless. But 1% of those infected, have the HPV16 strain which is a primary causative agent in cervical cancer, cancers of the anus and penis, and now is a known cause of oral cancer as well. It is likely that the changes in sexual behaviors of young adults over the last few decades, and which are continuing today, are increasing the spread of HPV, and the oncogenic versions of it. There are other minor risk factors which have been associated with oral cancers, but have not yet been definitively shown to participate in their development. These include lichen planus, an inflammatory disease of the oral soft tissues.

There are studies which indicate a diet low in fruits and vegetables could be a risk factor, and that conversely, one high in these foods may have a protective value against many types of cancer.

Possible signs and symptoms

One of the real dangers of this cancer, is that in its early stages, it can go unnoticed. It can be painless, and little in the way of physical changes may be obvious. The good news is however, that your dentist or doctor can see or feel the precursor tissue changes, or the actual cancer while it is still very small, or in its earliest stages. It may appear as a white or red patch of tissue in the mouth, or a small indurated ulcer which looks like a common canker sore. Because there are so many benign tissue changes that occur normally in your mouth, and some things as simple as a bite on the inside of your cheek may mimic the look of a dangerous tissue change, it is important to have any sore or discolored area of your mouth, which does not heal within 14 days, looked at by a professional. Other symptoms include; a lump or mass which can be felt inside the mouth or neck, pain or difficulty in swallowing, speaking, or chewing, any wart like masses, hoarseness which lasts for a long time, or any numbness in the oral/facial region. Unilateral persistent ear ache can also be a warning sign.

Other than the lips which are not a major site for occurrence any longer, common areas for oral cancer to develop in the anterior (front) of the mouth are on the tongue and the floor of the mouth. Individuals that use chewing tobacco, are likely to have them develop in the sulcus between the lip or cheek and the soft tissue (gingiva) covering the lower jaw (mandible). In the US, cancers of the hard palate are uncommon, though not unknown. The base of the tongue at the back of the mouth, the oropharynx (the back of the throat) and on the pillars of the tonsils, and the tonsillar crypt and the tonsil itself, are other sites where it is now more commonly found, particularly in young non smoking individuals. If your dentist or doctor decides that an area is suspicious, the only way to know for sure is to do a biopsy of the area. This is not painful, is inexpensive, and takes little time. It is important to have a firm diagnosis as early as possible. It is possible that your general dentist or medical doctor, may refer you to a specialist to have the biopsy performed. This is not cause for alarm, but a normal part of referring that happens between doctors of different specialties