Cdx Report Program: Heterogeneity Revealed in Current Reporting Practices for Hemato-Oncology Companion Diagnostic (CDx) Markers in Multiple Countries

Abstract

Introduction: In the current era of precision medicine, CDx tests have become the basis for optimal patient care and targeted treatment. While technical aspects of a CDx assay's performance are audited regularly by participation in external quality assessment (EQA) programs, the reporting of these CDx markers is rarely scrutinized. The aim of this first of its kind CDx report program is to get a detailed picture of hemato-oncology CDx marker reporting across multiple countries. Therefore, we evaluated multiple laboratory parameters and reviewed actual content of clinical CDx reports. Methods: Thirty-four clinical labs from Germany, Italy, Spain, and the United Kingdom provided..