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.
Longstanding rheumatoid arthritis causes rheumatoid nodules on the fingers. These are collections of inflammatory cells and fibrous tissue. Gout is another cause of lumps on the finger joints. These lumps are called âtophiâ and consist of collections of monosodium urate crystals, inflammatory cells, and fibrous tissue. People with elevated blood lipids can develop lumps on the finger joints due to the accumulation of cholesterol. Plant thorn synovitis is a condition caused by the puncture of a rose thron into the joint. This leads to infection in the joint and is an unusual but dangerous cause of lumps on the finger joint.