Cancer Registry Practice Test 2026 - Free Cancer Registry Practice Questions and Study Guide

MP/H stands for Multiple Primary and Histology Coding Rules. In cancer registry practice, this set of rules guides registrars on two key tasks: deciding when a second tumor should be counted as a separate primary versus a metastasis, and determining the correct histology (morphology) code for each tumor using ICD-O. This ensures consistent, comparable counting of primaries across patients and over time, and it standardizes how histology is recorded. The goal is to have accurate incidence data and reliable data for analysis, surveillance, and research. The other options don’t fit because they refer to different rule sets or omit essential parts of the acronym.