In adults, eczema occurs most frequently on the hands and elbows, and in bending areas such as the inside of the elbows and back of the knees. In young children, eczema is often seen on the elbows, knees, face, neck, and scalp. Signs and symptoms of atopic eczema include: 1  Itchiness. 2  Skin redness.
Sphingolipids are composed of a backbone of sphingosine which is derived itself from glycerol. Sphingosine is N-acetylated by a variety of fatty acids generating a family of molecules referred to as ceramides. Sphingolipids predominate in the myelin sheath of nerve fibers.
Triglycerides and phospholipids are both lipid derivatives of glycerol, which is a three-carbon molecule with three attached hydroxyl groups.riglycerides and phospholipids both contain long-chain fatty acids attached to one or more of the glycerol molecule's hydroxyl groups. Both classes of lipids can utilize the same types of fatty acid chains, in terms of both length and saturation.