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.
What causes lung nodules? Quick Answer. According to the Seattle Cancer Care Alliance, lung, or pulmonary, nodules have numerous causes, including fungal or bacterial infection, sarcoidosis, lymphoma, lung cancer and cancers metastasized from other organs.
Granulomas can also be caused by other infections, including coccidiomycosis and cryptococcosis. Pulmonary nodules can be caused by noninfectious conditions such as Wegener's granulomatosis, rheumatoid arthritis and sarcoidosis. Neoplasms can lead to pulmonary nodules, notes Cleveland Clinic. Neoplasms can be benign or malignant. Benign neoplasms may be hamartomas, neurofibromas, blastomas or fibromas. Malignant neoplasms may be caused by lung cancer, or these neoplasms may be sarcomas, carcinoids, lymphomas or metastatic tumors.