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.
1 It can occur due to a lack of iodine in your diet, but most people with goiters have a thyroid gland that functions normally.  Thyroid cancer is another cause of thyroid nodules, but most thyroid nodules arenât cancerous. According to Cleveland Clinic, less than 5 percent of thyroid nodules are cancerous.