3) Hyperuricemia:
Uric acid is a product of cellular metabolism, meaning that when a cell dies its DNA breaks into its basic components, which may either be recycled or converted into more basic chemical waste products. One of those components is uric acid. Uric acid is excreted by the kidney and can increase in cancer patients owing to their high rate of cellular destruction or due to chemotherapy acting on the cancer, a condition called tumor lysis syndrome. Allopurinol or rasburicase are drugs commonly used in the treatment of hyperuricemia.