Collagenopathy: Any one of a congenital and rare group of disorders that affect connective tissue. Connective tissue supports the body’s joints and organs. The collagenopathies are caused by defects in type II or type XI collagen. Collagens are complex molecules that provide structure, strength, and elasticity (the ability to stretch) to connective tissue. The conditions are considered together because type II and type XI collagen are both components of a particular type of cartilage (hyaline cartilage) in joints and the spinal column, the inner ear, and the jelly-like substance that fills the eyeball (the vitreous), resulting in similar clinical features.
- Collapsed lung
Collapsed lung: Failure of full expansion of a once fully expanded lung. Medically called atelectasis. The word comes from the Greek “a-” (without) + “telos” (complete) + “rectasis” (expansion) = without complete expansion.
Collarbone: A horizontal bone above the first rib that makes up the front part of the shoulder. Also known as the clavicle, the collarbone links the breastbone (sternum) with the scapula, a triangular bone in the back of the shoulder. One end of the collarbone connects to the sternum, forming one side of the sternoclavicular […]
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 […]
- 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.