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Stomach cancer, also known as gastric cancer, is a malignant tumor of the stomach. It's a cancer that develops from the lining of the stomach . [ 10 ] Most cases of stomach cancers are gastric carcinomas , which can be divided into a number of subtypes, including gastric adenocarcinomas . [ 2 ]
About 70% occur in the stomach, 20% in the small intestine and less than 10% in the esophagus. Small tumors are generally not aggressive, especially when cell division rate is slow. GIST tumors commonly metastasize to the liver (in 28% of cases) and/or to the greater omentum , lesser omentum , or mesentery (in 30% of cases).
This classification is widely used by cancer registries. It is currently in its third revision (ICD-O-3). ICD-10 includes a list of morphology codes. They stem from ICD-O second edition (ICD-O-2) that was valid at the time of publication.
Cancer of the stomach, also called gastric cancer, is the fourth-most-common type of cancer and the second-highest cause of cancer death globally. [2] Eastern Asia (China, Japan, Korea, Mongolia) is a high-risk area for gastric cancer, and North America, Australia, New Zealand and western and northern Africa are areas with low risk. [5]
The first successful gastrectomy was performed by Theodor Billroth in 1881 for cancer of the stomach.. Historically, gastrectomies were used to treat peptic ulcers. [7] These are now usually treated with antibiotics, as it was recognized that they are usually due to Helicobacter pylori infection or chemical imbalances in the gastric juices.
Linitis plastica (sometimes referred to as leather bottle stomach) is a morphological variant of diffuse stomach cancer in which the stomach wall becomes thick and rigid. [ 1 ] Linitis plastica is a type of adenocarcinoma and accounts for 3–19% of gastric adenocarcinomas. [ 1 ]
Primary gastric lymphoma (lymphoma that originates in the stomach itself) [1] is an uncommon condition, accounting for less than 15% of gastric malignancies and about 2% of all lymphomas. However, the stomach is a very common extranodal site for lymphomas (lymphomas originate elsewhere and metastasise to the stomach). [ 2 ]
Poorly cohesive gastric carcioma (signet-ring cell type) x400, H&E stain . Poorly cohesive gastric carcinoma (dyscohesive carcinoma, carcinoma with a lack of intercellular connections) is a malignant tumour of epithelial origin, characterized by diffuse distribution of tumour cells, isolated from each other or in small groups.