Lipofuscin's the name given to finely granular yellow brown pigment granules composed of lipid-containing residues of lysosomal digestion. It's considered one of the aging or "wear and tear" pigments; found in the liver, kidney, heart muscle, adrenals, nerve cells, and ganglion cells. It's specifically arranged around the nucleus. Formation and turnover It appears to be the product of the oxidation of unsaturated fatty acids, and may be symptomatic of membrane damage, or damage to mitochondria a… (More on Lipofuscin)