Reported from health news and health magazines, most patients are diagnosed with cancer in general has on the later stages of the disease, so they generally have shorter survival time. It is also for stomach cancer. However, according to health and wellness articles, detected early signs of stomach cancer could bring more alternative cancer treatments and make treatment more effective.
What is early stage stomach cancer?
Early stage stomach cancer is defined as the degree of invasion of stomach cancer that has not overcome the lower layer of mucosa, regardless of the status of lymph node metastasis or not. This type of cancer has a better prognosis than progress stage stomach cancer (90% survival after 5 years). Currently the detection of early stomach cancer is getting more attention, due to the development of imaging techniques that permit early detection of lesions as endoscopy with narrow band of light, magnification endoscopy.
Normally, a stomach cancer lesion at an early stage is very small in size, the size must not exceed a few millimeters to 5-7cm, so that lesions do not affect food digestive function of the stomach and completely do not cause discomfort or abdominal pain for patients. If you want to detect early stage stomach cancer, it should be based on screening programs. An obvious symptom of upper gastrointestinal tract can occur 6-12 months before being diagnosed stomach cancer early and can have in 90-95% of patients that cannot be identified through screening. Ulcerative lesions may be the harbinger that is more valuable than a raised lesion. With positive screening stomach cancer program in East Asian countries (mainly be carried out in Japan), many patients are detected stomach cancer early when asymptomatic.
With late-stage patients may have warning signs or suggestive symptoms of short of blood or weight loss, with the proportion from 5-15% and 4-40%. In advanced stage stomach cancer, the weight loss rate is over 60%. At this time, the cancer is no longer in the early stages can be completely treated more thoroughly.
Dyspeptic symptoms can occur in any case, especially the rate of stomach cancer in patients with dyspepsia is very low in the US and Western countries, so there is no clinical symptoms or test that allows distinguishing benign indigestion to severe indigestion.
Is it difficult to diagnosis?
To diagnose this cancer, gastroscopy is the only method, and also is the most valuable along with biopsy of suspicious lesions or systematic biopsy.
Usually light endoscopy: common scanner means in our country today, the accuracy can reach 90-96%. The endoscopic lesions can be: bulging types of polyps or 1 flat surface sample, change the color of lining, with concave in the center, or ulcerative lesions. The detection of small lesions will face many difficulties, even with experienced endoscopic doctor. Hence the need to survey the entire stomach carefully, meticulously, and biopsy of suspected locations.
1/4 method: this method is the most appreciated method in gastroscopy. For each region of the stomach requires endoscopy doctors to observe and capture photographs by 1/4 method: divided into 4 micro endoscopic field and every time of capturing just focus only on capturing and observing 1/4 micro field only.
If there are signs of stomach ulcers, location and number of pieces of biopsy are extremely important, as biopsy more pieces, more ability to catch the higher cancer lesions, but really, it is still no consensus on biopsy-piece quantities.
With stomach ulcer lesion biopsy that has not caught cancer cells, the leading role is tracked via endoscopy, number of biopsy pieces and time which depends on characteristics of ulcerative lesions, patients characteristics.
Other colonoscopy methods: endoscopic have narrow bands of light with or without magnification, dye endoscopic, fluorescence endoscopy.
These methods complement conventional colonoscopy methods, which increases the accuracy of diagnosis, but the end result of diagnose of early stage stomach cancer still have to rely on a biopsy for histopathology.