it is caused by a chromosomal defect in which the liver is not capable of secreting copper into the bile. therefore, copper is accumulated in the body leading to copper poisoning, but most often symptoms do not appear until after at least 5 years and in some cases several years. if left untreated, the disease can result in jaundice, hepatitis, and cirrhosis of the liver - besides the symptoms mentioned above.

How would the previous sentence be correctly capitalized?
It is caused by a chromosomal defect in which the liver is not capable of secreting copper into the bile. Therefore, copper is accumulated in the body leading to copper poisoning, but most often symptoms do not appear until after at least 5 years and in some cases several years. If left untreated, the disease can result in jaundice, hepatitis, and cirrhosis of the liver - besides the symptoms mentioned above.