7. Cystic Fibrosis
Cystic fibrosis is typically inherited, and it is a life-threatening disease that can severely damage the lungs, the digestive system and other important systems of the body that must be in good working order for a person to remain healthy. Cystic fibrosis also created a thick, heavy mucus that can create scarring in the pancreas. This damage to the pancreas disturbs the normal creation of insulin, which can cause the patient to develop diabetes. In this case, the diabetes is known as a reaction to the cystic fibrosis, which is commonly referenced to as a secondary disease.