Collateral: In anatomy, a collateral is a subordinate or accessory part. A collateral is also a side branch, as of a blood vessel or nerve.
After a coronary artery occlusion, collaterals (that is, collateral vessels) often develop to shunt blood around the blockage.
The word “collateral” comes from the Latin “col-“, with + “latus”, side = with the side, situated at the side. (The prefix “col-” is a variant form of “com-” meaning “with” that is used before an “l”.) Hence, collateral means accessory, subordinate, secondary, serving to support or reinforce.
In the sense of being on the side and in the sense of serving to support or reinforce, there are collateral ligaments outside of the knee joint. The collateral ligaments help provide stability and strength to the knee joint:
- Collateral knee ligament, lateral
Collateral knee ligament, lateral: A ligament that straps the outside of the knee joint and provides stability and strength to the knee joint. Abbreviated LCL.
- Collateral knee ligament, medial
Collateral knee ligament, medial: A ligament on the inner side of the knee joint. The medial collateral knee ligament adds stability and strength to the knee joint. Abbreviated MCL.
Coloboma: A congenital malformation (birth defect) in which part of the eye does not form due to failure of fusion of an embryonic feature called the intraocular fissure. The resultant coloboma can be likened to a missing slice from a pie that may involve a number of different structures within the eye including the choroid, […]
Colon: The long, coiled, tubelike organ that removes water from digested food. The remaining material, solid waste called stool, moves through the colon to the rectum and leaves the body through the anus. Also known as large bowel and large intestine.
- Colon cancer
A malignant tumor arising from the inner wall of the large intestine (the colon). In the US, colon cancer is the third leading type of cancer in males and the fourth in females. Risk factors for cancer of the colon and rectum (colorectal cancer) include colon polyps, long-standing ulcerative colitis, and genetic family history. Most […]