During the operation, a small piece of your skull is cut away so the surgeon can access the cause of the bleeding. They can then repair any damaged blood vessels and ensure there are no blood clots that could restrict the flow of blood in your brain. If a blood clot has formed, it may be removed.
Coal workers' pneumoconiosis (CWP), also known as black lung disease or black lung, is caused by long exposure to coal dust. It is common in coal miners and others who work with coal.oal workers' pneumoconiosis (CWP), also known as black lung disease or black lung, is caused by long exposure to coal dust. It is common in coal miners and others who work with coal.
from my own experience, what you refer to as black colon is also called  melanosis coli which means: it's a condition associated with chronic laxative use in which dark pigment is deposited in the lining layers of the large intestine(which is the colon). the pigment results in a characteristic dark brown to black lining of the large intestine.