Tyro-Screen (Professional)Hydroxy Phenylalanine (Tyrosine) Urine Detection Kit Tyro Screen is a Urine Cancer Detection Kit that is ideal for detecting Tyrosine Kinase levels which are known to be the precursors to cancer. It is a vital tool for detecting cancer in the early stages so that the patient can move forward with further examinations, preventions, and treatment. How does it work? Those patients who have malignant tumors will show abnormal metabolism of amino acids,