What is a malignant tumor?
Cancer or malignant tumor is a disease entity where the cells in the tissues of an organ (like the breast, lung, prostate, liver, brain, etc.) change into a new morphology with bizarre and aggressive invasive behavior. These malignant cells grow rapidly, replicate beyond control, transforming the normal anatomy of an organ to a giant unrecognizable part of the body. Example of this is neglected cancer of the thyroid where the tumor becomes larger than the patient’s head. Cancer spreads to other organs adjacent to them (local metastasis) or travel by blood or lymph circulation to invade other organs in other region of the body (distant metastasis), like lung cancer spreading to the brain or breast cancer metastasizing to the bones. The normal biological “growth control or timing” is lost and the tumor mass keeps on growing until it is removed or spreading till the patient expires.
Why do cancers develop?
Cancers develop among those individuals who were born with a defect in their DNA or whose DNA has been damaged following exposure to physical or chemical irritants, which are called carcinogens. Some examples of these are chronic exposure to radiation, cigarettes, alcohol, etc. The resistance or immunity to cancer in some people (inspite of similar exposures to cancer-causing agents) is conferred on them by their genetic integrity. Someday, medical science may be able to prevent cancers through “gene therapy,” by removing the specific gene(s) or portion of the gene that is defective.
Are cigarettes really carcinogenic?
There is no doubt any more that smoking cigarettes causes cancer, not only of the lungs but the throat, breasts, prostate, cervix, and other organs. The tobacco industry has finally “confessed” its prior knowledge (which they subdued for decades) that cigarettes can indeed cause cancers and a host of cardiovascular illnesses, including heart attacks. Individual cancer victims of cigarette smoking have successfully sued and have been awarded hundreds of millions of dollars by the courts in the United States.
How about secondhand smoke?
Secondhand cigarette (sidestream) smoke is even worst as a carcinogen than firsthand (mainstream) smoke, because there are about 4000 chemical agents in sidestream smoke, 200 of them known poisons. A significant number of cancers have been caused by secondhand smoke.
Are skin moles potential cancer growths?
Depending on the appearance, pigmentation, location, size or speed of growth, etc., “normal moles” can be pre-malignant, one that could transform into cancer. However, majority of moles that people have are benign (non-cancerous). If there is anything that is unusual about the “behavior” of a mole, it should be examined by a dermatologist without delay. One particular mole, malignant melanoma, is savagely cancerous and rapidly spreads to kill the patient, if not discovered and treated early enough.
Is excessive exposure to sunlight carcinogenic?
Yes, prolonged and repeated exposure to bright sunlight (ultraviolet rays) can cause cancer of the skin. Asian women are less prone to skin cancer formation (and have better complexion than their American and European counterparts) because by nature they shun sunlight and use umbrellas even on the beach! Skin Sunblocker lotions or creams (at least UV 15 to 40) are recommended two to 3 times a day. But most importantly, minimizing exposure to sunlight (even indirectly) to less than 30 minutes twice a day, or an hour a day, is a prudent preventive measure.
Does frequent sex cause cancer?
Sex per se does not directly cause any form of cancer, no matter how frequent. However, having multiple sex partners increases a woman’s chance of developing cervical cancer, besides hepatitis. The reverse does not seem to raise a man’s chance of having prostate cancer. Lymphogranuloma Venereum is a venereal condition that is sexually transmitted, where the lymph glands in the groins turn into huge tumor masses. AIDS, while deadly, is not considered a form of cancer in the usual medical sense. It is more of “depletion and paralysis” of the immune system to the point that the body’s natural defenses against various common diseases are weakened or even lost, rendering the body helpless and vulnerable to all illnesses.
Does eating spicy foods cause cancer of the stomach?
There is no scientific evidence to prove that regular ingestion of spicy foods (like in Thailand, India, Mexico, etc) causes cancer of the stomach. Neither is there any medical proof that eating temperature-hot foods (like in China) increases the incidence of cancer of the esophagus or stomach. While cancer of the stomach is quite common in Japan, the causal relationship between this malignancy and eating raw food (like sushi) or eating hot foods has not been established. If properly secured, prepared and free of infestation, sushi is one of the healthiest foods there is. Chronic alcohol intake, on the other hand, has been found to be associated with cancer of the esophagus (foodpipe), stomach, etc.
Does hepatitis lead to cancer?
Yes, a significant number of patients with Hepatitis B or C develop Hepatoma (cancer of the liver), which is very common in the Philippines and other parts of Asia. And hepatitis could be so subtle that anyone can have it without knowing he/she has it. Food handlers with hepatitis and infected sex partners (kissing, using the same toothbrush, drinking contaminated water, eating contaminated food, oral or anal sex) can transmit the hepatitis to others.
Is pulmonary tuberculosis a form of cancer?
Although untreated pulmonary TB could behave like cancer by spreading to the brain, bones, kidney, liver, etc. in a rapid fashion, it does not satisfy the pathological criteria for malignancy. PTB is an infection caused by a bacteria called tubercle bacilli. Prior to the advent of effective treatment for tuberculosis, this disease killed millions and millions of people like an epidemic around the world, especially in the third world countries, where poverty, malnutrition, poor hygiene and lack of medical care allowed the disease to spread and flourish.
Has cancer therapy improved over the years?
Yes, most definitely. While many forms of cancers are still a major killer in the world today, there have been significant strides and advances made in the diagnosis and management of some of them. Oncology (medical specialty in cancer therapy) has come of age and sophistication. Technological breakthroughs in various fields, including in computer technology and biotechnology, have likewise propelled the discovery of new and more effective modes of prevention, diagnosis and therapy for many diseases, including cancers. Someday, hopefully, cancer will be a disease of the past, like the deadly smallpox, which the Philippines has totally eradicated decades ago. In this respect, we are ahead of other countries, including the United States.
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Philip S. Chua, MD, FACS, FPCS, Cardiac Surgeon Emeritus in Northwest Indiana and chairman of cardiac surgery from 1997 to 2010 at Cebu Doctors University Hospital, where he holds the title of Physician Emeritus in Surgery, is based in Las Vegas, Nevada. He is a Fellow of the American College of Surgeons, the Philippine College of Surgeons, and the Denton A. Cooley Cardiovascular Surgical Society. He is the chairman of the Filipino United Network – USA, a 501(c)(3) humanitarian foundation in the United States. Email: [email protected]
