If you have any of these symptoms, you should see your doctor for evaluation. While many of these symptoms are caused by common non-cancerous conditions, early detection is critical if a tumor is present.

Answer: Symptoms that could be associated with colorectal cancer include a change in bowel habits such as constipation, diarrhea, or narrowing of the stool that lasts for more than a few days; cramping or steady abdominal (stomach area) pain; weakness and fatigue; rectal bleeding or blood in or on the stool; or a feeling of having to have a bowel movement that is not relieved by doing so. Since other conditions can cause these symptoms, a medical work up is needed. See similar questions...

Localized and curable prostate cancer has no symptoms. If you are experiencing a decrease in the force of the urinary stream or other voiding issues, this is most likely due to BPH and not prostate cancer. If it turns out that you do have localized prostate cancer and some problems with urination, BPH is occurring coincidentally with the prostate cancer. See similar questions...

There may be no symptoms in the early stages. The signs and symptoms of gallbladder cancer are like those of gallstones or an inflamed gallbladder. Common symptoms include the following. See similar questions...

NO. More than 2000 clinical studies have been conducted on the use of LILT and in all of these studies no mutational effects have ever been observed resulting from therapy with wavelengths in the red or near-infrared ranges in the doses used by laser therapy. See similar questions...

The answer is no. No mutational effects have been observed resulting from light with wavelengths in the red or infra-red range and of doses used within LLLT. But what happens if I treat someone who has cancer and is unaware of it? Can the cancer's growth be stimulated? The effects of LLLT on cancer cells in vitro have been studied, and it was observed that they can be stimulated by laser light. However, with respect to a cancer in vivo, the situation is rather different. See similar questions...

Severe, long-standing GERD can damage the esophagus and cause a condition known as Barrett's esophagus wherein the normal lining of the esophagus is replaced by a lining more like that of the stomach or intestine. It is thought that this replacement may be an attempt by the body to protect itself from further injury by acid. The risk of esophageal cancer appears to increase significantly in patients with Barrett's esophagus. The only way to diagnose Barrett's esophagus is by endoscopy. See similar questions...

There are no known causes of prostate cancer. Approximately 10 % of prostate cancers are inherited but the remaining cases occur at random. A “prostate cancer gene” has not yet been identified. There are links between diets rich in saturated fats and an increased incidence of prostate cancer but this evidence is based on epidemiologic data and not based on data obtained from clinical practices. See similar questions...

Gallstones are the most common risk factor for gallbladder cancer. Between 75% and 90% of people with gallbladder cancer also have gallstones and an inflamed gallbladder. Gallbladder cancer is more likely to happen if your gallbladder has a single large gallstone than several small ones. Doctors believe that large gallstones grow over a long time, irritating the gallbladder wall and increasing the risk for gallbladder cancer. See similar questions...

Laser beam is very safe because laser medicine generally utilizes wavelengths above 632 nm (nanometer). Therefore the laser beam is not ionizing radiation (which can cause cancer) like X-rays, Gamma rays etc. Sunlight contains cancer causing wavelengths (below 320 nm), which is ultraviolet. There is no certain limit for penetration of laser light. It spreads in all directions and is absorbed in tissues. Light's intensity weakens the deeper from the target point it goes. See similar questions...

Often, a crooked or humped nose has problems on the inside as well. Nasal surgery corrects internal abnormalities, actually improving your breathing function as well as your outer appearance. See similar questions...

Nasal cavity and sinus cancers are rare. Approximately 2,000 cases occur in the United States each year. These cancers occur more often in men than women, and most patients are in their 50s or 60s. See similar questions...

While doctors know that certain risk factors may make a person more likely to develop sinonasal cancer, the exact cause of most cancers is unknown. Cancers develop when genes that control cell growth and division become defective. Some people may have inherit certain gene defects or mutations from their parents, however, most mutations probably occur during a patient's lifetime, rather than being present from birth. See similar questions...

Your doctor will ask you several questions about the history of your condition and your symptoms. He or she will then perform a thorough head and neck examination, paying particular attention to the nasal cavity, face, throat and neck. A small fiberoptic telescope (link) may be used to perform an examination of the nasal and sinus areas. This procedure is painless and done often for patients with nose or sinus problems. See similar questions...

Animals produce various substances that can cause an allergic reaction. The main culprits are proteins in the urine, saliva, or dander (dead skin flakes). In cats, for example, the main substances that cause problems are proteins found in cat saliva which often mixes with house dust. In rodents such as mice, rats or guinea pigs, it appears that urine contains the substance that most commonly causes allergy. See similar questions...

VOCs can cause irritation of the eyes, nose and throat, nausea and dizziness, and skin problems. Higher amounts can cause irritation of the lungs and wheezing. Higher exposures to formaldehyde may also cause memory problems and anxiety. See similar questions...

A hard mass that has irregular edges and is painless is more likely to be cancerous. (Cancers can sometimes be tender, soft and rounded, although it is rare.) See similar questions...