Nation Her cancer surgery was a success. Then a genetic condition let a chemo drug ravage her body November 2, 2019 Lindy Washburn, North Jersey Record Comments Off on Her cancer surgery was a success. Then a genetic condition let a chemo drug ravage her body Kerrie Prettitore's genetic mutation kept her body from breaking down the chemo drug 5-FU. A test for the mutation exists but is rarely used.