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Adenoma is a benign tumor of glandular tissue, such as the mucosa of stomach, small intestine, and colon, in which tumor cells form glands or gland-like structures. In hollow organs (digestive tract), the adenoma grows into the lumen - adenomatous polyp or polypoid adenoma.
Vacuoles are more prominent in mucinous tumors but can be seen in serous tumors as well. Adenocarcinoma [ 1 ] ( / ˌ æ d ɪ n oʊ k ɑːr s ɪ ˈ n oʊ m ə / ; plural adenocarcinomas or adenocarcinomata / ˌ æ d ɪ n oʊ k ɑːr s ɪ ˈ n oʊ m ə t ə / ; AC ) is a type of cancerous tumor that can occur in several parts of the body.
[33] [34] A prominent and well studied example of this phenomenon is the tubular adenoma, a common type of colon polyp which is an important precursor to colon cancer. The cells in tubular adenomas, like most tumors that frequently progress to cancer, show certain abnormalities of cell maturation and appearance collectively known as dysplasia.
The following is a list of cancer types. Cancer is a group of diseases that involve abnormal increases in the number of cells, with the potential to invade or spread to other parts of the body. [1] Not all tumors or lumps are cancerous; benign tumors are not classified as being cancer because they do not spread to other parts of the body. [1]
The colorectal adenoma is a benign glandular tumor of the colon and the rectum. It is a precursor lesion of the colorectal adenocarcinoma ( colon cancer ). [ 1 ] [ 2 ] [ 3 ] They often manifest as colorectal polyps .
An adenoma is a tumor of glandular tissue, that has not (yet) gained the properties of cancer. [ citation needed ] The common adenomas of the colon ( colorectal adenoma ) are the tubular , tubulovillous , villous , and sessile serrated (SSA). [ 18 ]
Serous cystadenoma of the pancreas, serous microcystic adenoma: Micrograph showing a pancreatic serous cystadenoma. H&E stain. Specialty: General surgery, gastroenterology: Symptoms: Usually asymptomatic: Usual onset: 50–60 years of age: Risk factors: Female gender: Treatment: Surgical resection (if symptomatic) Deaths: 0.1% [1]
The symptoms that the patient exhibits usually reflect the extent of the cancer's spread. Lung cancers that are discovered early may cause symptoms localized to the respiratory system. However, lung cancer that is advanced will cause patients to experience additional signs and symptoms secondary to the cancer spreading to other organ systems. [5]