During an autopsy, the lungs, liver, and brain are examined for signs of disease or damage. Common lung findings include congestion, inflammation, and fluid in the air sacs, which can result from infections, heart failure, or toxins. The liver is checked for inflammation, fatty liver disease, cirrhosis, and cancer from factors like viruses, alcohol, or medications. The brain is assessed for swelling, tissue death from lack of blood flow, and bleeding, as well as conditions such as Alzheimer's, Parkinson's, and multiple sclerosis that cause specific pathological changes.