The lipids are a large and diverse group of naturally occurring organic compounds that are related by their solubility in nonpolar organic solvents (e.g. ether, chloroform, acetone & benzene) and general insolubility in water.hospholipids are the main constituents of cell membranes. They resemble the triglycerides in being ester or amide derivatives of glycerol or sphingosine with fatty acids and phosphoric acid.
As of now, research doesnât clearly indicate a specific cause of rheumatoid nodules and why exactly they develop in some patients and not in others. Given they generally form on extensor joints, rheumatoid nodules could be the result of repeated pressure on the affected joints over time.
Benign pulmonary nodules can have a wide variety of causes. Many are the result of inflammation in the lung as a result of an infection or disease producing inflammation in the body. The nodule may represent an active process or be the result of scar tissue formation related to prior inflammation.t is sometimes also called a spot on the lung or a coin lesion. Pulmonary nodules are generally smaller than 3 centimeters in diameter. If the growth is larger than that, it is known as a pulmonary mass. A mass is more likely to represent a cancer than is a nodule.