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Types of Colon Cancer

Types of colorectal cancer

Ninety Five per cent of Colon cancer cases are often found to be of Adenocarcinoma of the colon and rectum. This form of cancer develops on the lining cells of the large intestine gastrointestinal tract. Adenocarcinomas start growing in the form of small growth structures called the polyp. Polyps are a type of tissue found in rectum or colon. When a type of tissue called Adenocarcinomaoma starts growing abnormally, it forms Adenocarcinoma cancer.

Other less common types of colon cancer include: 

  • Gastrointestinal stromal tumours
  • Colorectal lymphomas
  • Carcinoid tumours 
  • Melanomas 

All the different types of colon cancer are explained below:

Colorectal Adenocarcinoma

Cancer that grows in epithelial cells and lines the surfaces inside and outside the body is “carcinoma”. Adenocarcinomas, which is colon’s part of the rectum and develop in the lining of the large intestine. Adenocarcinomas, which grows in large intestine, often starts growing in the inner lining and then spread to other layers. There are two subtypes of Colorectal Adenocarcinoma

  1. Mucinous Adenocarcinoma: Mucinous Adenocarcinoma is around 60% of mucus, which spread cancer cells more quickly and become more aggressive than typical adenocarcinomas.
  2. Signet ring cell adenocarcinoma: Signet ring cell adenocarcinoma is named for its appearance under the microscope and amounts for less than 1 per cent of adenocarcinomas. These are typically more aggressive than Mucinous adenocarcinoma cells and a little difficult to treat. 

Gastrointestinal Carcinoid tumours

Neuroendocrine cells are the cells where Carcinoid tumour develops. Neuroendocrine cells also help to regulate hormones production. Carcinoid tumours are among the group of cancers called neuroendocrine tumours. These tumour cells are slow growing, which can be created in the lungs or gastrointestinal tract.

Primary colorectal lymphomas

Non-Hodgkin lymphoma is a type of cancer, which develops in lymphatic systems and that too in the specific cells called lymphocytes. Lymphocytes are the white blood cells, which help in fighting the injection. These lymphomas can be developed in different parts of the body like lymph nodes, bone marrow, spleen, thymus and the digestive tract. Primary colorectal lymphomas type cancer cells are more common in males than women are. 


Leiomyosarcomas, which is another form of sarcoma, leiomyosarcoma. Leiomyosarcoma essentially means “cancer of smooth muscle.” Leiomyosarcoma is a rare kind of cancer among all colon cancer accounts for 0.1 per cent of all colorectal cases. 

Gastrointestinal stromal tumours

Gastrointestinal stromal tumour cells are also rare cancerous cells, which generate in a special cell found in the lining of the gastrointestinal tract called interstitial cells of Cajal. Mostly, Gastrointestinal stromal tumour cells generate in the stomach while other locations are small intestine and the rectum. 

Hereditary colon cancer 

of all colon cancer patients, 5 to 10 per cent of patients form colon cancer because of the history related to respective cancer with our genes. Mutations of genes can cause hereditary colon cancer 

Most of the people develop with colon cancer, and they have diagnosed with adenocarcinoma colon cancer. Colon cancer otherwise is of many other different types as we have discussed above. 

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