Stomach Cancer

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Assignment 2.1 The Chemical Basis of Life and Cells
Stomach Cancer
Dr. Guggisberg


Cancer starts when cells in the body begin to grow out of control. Cells in early any part of the body can become cancer. Stomach cancer, also called gastric cancer is a cancer that starts in the stomach. Stomach cancer should not be confused with other cancers that can occur in the abdomen, like cancer of the colon, liver, pancreas or small intestine because these cancers may have different symptoms, different outlooks, and different treatment.
The stomach is a sac-like organ that holds food and starts to digest it by secreting gastric juice. The food and gastric juice are mixed and then emptied into the first
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As a cancer grows from the mucosa into deeper layers, the stage becomes more advanced and the prognosis is not good.

The different types of stomach cancers includes:
-Adenocarcinoma: These cancers develop from the cells that form the inner most lining of the stomach (mucosa). About 90% to 95% of cancers of the stomach are adenocarcinomas.
-Lymphomas: These are cancers of the immune system tissue that are sometimes found in the wall of the stomach. About 4% of stomach cancers are lymphomas.
-Gastointestinal stromal tumor (GIST): These are rare forms of cells in the wall of the stomach called Interstitial cells of Cajal. Some of these tumors are non-cancerous; others are cancerous. Although GISTs can be found anywhere in the digestive tract, most are found in the stomach.
-Carcinoid Tumor: These are tumors that start in hormone-making cells of the stomach. Most of these tumors do not spread to other organs. About 3% of stomach cancers are carcinoid tumors.
- Other types of cancer, such as squamous cell carcinoma, small cell carcinoma, and leiomyosarcoma, can also start in the stomach, but these cancers are very
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