What are the types of colorectal cancer?
There are different kinds of colorectal cancer, which can have an impact on the kind of treatment a patient receives.
Adenocarcinoma is cancer that begins in your body’s mucus-producing glandular cells. Those that start in the rectum and colon account for 95 percent of all cases of colorectal cancer.
Adenocarcinomas of the rectum or colon usually develop in the large intestine’s lining. However, it can spread to the other layers.
There are two subtypes of this, which are less common. The first is mucinous adenocarcinomas, which make up 10 to 15 percent of colorectal adenocarcinomas. Meanwhile, signet ring cell adenocarcinoma is often more difficult to treat and makes up less than 1 percent of all adenocarcinomas.
Primary Colorectal Lymphomas
This is a kind of non-Hodgkin lymphoma that develops in the lymphocytes in the lymphatic system. Lymphocytes are a kind of white blood cell, which helps ward off infections. It is also a rare kind of colorectal cancer.
Gastrointestinal Carcinoid Tumors
A carcinoid tumor develops in the neuroendocrine cells, which are nerve cells that aid the regulation of hormone production. The tumors are also part of a group of cancers that are called neuroendocrine tumors.
Carcinoid tumor cells grow slowly. They can also develop in the lungs.
Gastrointestinal Stromal Tumors (GIST)
GIST is a rare type of colorectal cancer that develops in the ICCs (interstitial cells of Cajal), which are cells in the gastrointestinal lining. These are also considered sarcomas, which are cancers that start in the connective tissues like fat, cartilage, and deep skin tissues.
Melanoma is often associated with skin cancer. However, these can develop anywhere, including the rectum or colon.