For ages, they have been willing to throw down over the merits of serif versus sans-serif typefaces.
Quick Answer. Liver nodules, usually a sign of liver disease, can be caused by certain parasitic or viral infections, immune system abnormalities, cancer and genetic conditions, according to Mayo Clinic. Contributing factors include heavy alcohol or drug use, unprotected sex, obesity, diabetes and exposure to certain chemicals.
A: Lung nodules are basically spots on the lungs of a certain size and in most cases they are a sign of lung cancer. There are a number of reasons why they appear on the lungs, such as smoking, long term exposure to asbestos or such.