Sound are more generally accepted as required in order to properly identify the extent of disease, and all will likely be done in a patient diagnosed with gastric cancer. Other, more routine tests done before treatment include blood screening tests, to insure that overall blood counts are within normal limits, and that a patient's liver, kidneys, and overall health are normal. All of these tests are important to determine the extent of the disease, which allows the disease to be staged. The stage provides a guideline for the optimal treatment of the gastric cancer as well as the prognosis. Staging the staging of a cancer basically describes how much it has grown before the diagnosis is made, documenting the extent of disease. Unfortunately, gastric cancer often presents as a more advanced disease because of lack of early diagnosis, due mainly to the lack of specific associated symptoms. Before the staging systems are introduced, here's some background on how cancers grow and spread, and therefore become more advanced in stage. Cancers cause problems because they spread and can disrupt the functioning of normal organs. One way gastric cancer can spread is by local extension to invade through the stomach wall and into adjacent structures. These surrounding structures include the soft tissues and fat surrounding the stomach as well as other organs such as the spleen, pancreas, large intestine, small intestine, liver, and large blood vessels. Gastric cancer can also spread by accessing the lymphatic system. The lymphatic circulation is a complete circulation system in the body (somewhat like the blood circulatory system) that drains into various lymph nodes. When cancer cells access this lymphatic circulation, they can travel to lymph nodes and start new sites of cancer. This is called lymphatic spread. Gastric cancers have a propensity to undergo lymphatic spread because there are many small lymphatic vessels contained within the stomach wall. The first lymph nodes that cancer cells spread to are the "perigastric" nodes along the sides of the stomach itself. viagra without a doctor prescription viagra without a doctor prescription generic viagra online cheapest viagra to buy viagra online viagra without a doctor prescription cheap generic viagra buy real viagra online buy viagra generic viagra online They can then spread to lymph nodes adjacent to the liver, spleen, pancreas, and aorta.