A 52 year-old African-American male has been diagnosed with chronic myeloid leukemia a week ago. His current medical history is significant for gout and hypertension. As he is being prepared for his chemotherapy you’re concerned about the development of hyperuricemia. You ordered some laboratory tests that revealed, among other findings, a uric acid level of 9.8 mg/dl. Before starting this patient on rasburicase, he should be screened for which of the following conditions?
