P165. One Step Nucleic Acid amplification testing for CK19: Single copy number >5, 000 copies/μL vs Total Tumour Load of 15, 000 copies/μL. Issue 6 (June 2015) - Atherton, Gavin; Tafazal, Habib; Amin, Verda; Dakka, Mahmoud; Khan, Mashuk; Harries, Simon; Jones, Lucie; Clarke, Dayalan