North American Association of Central Cancer Registries, Inc



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1Introduction

In the U.S. and Canada, data standards for electronic transmission of pathology results to central cancer registries are overseen by the North American Association of Central Cancer Registries, Inc. (NAACCR). The latest version of NAACCR’s e-path standard is the Standards for Cancer Registries Volume V: Pathology Laboratory Electronic Reporting, Version 4.0 based on HL7 2.5.1, available from the NAACCR website (www.naaccr.org). This document rests on the specific assumption that for many central cancer registries their e-path infrastructure resides and/or operates within a larger ‘structure’, the infrastructure of a Public Health Information Network (PHIN) supported system, specific to the U.S. realm.



1.1Problem Statement, Goal, and Scope of this Document




1.1.1The Problem


NAACCR Standards for Cancer Registries Volume V, the Current Registry Standard, is in use in the U.S. and Canada, and any changes will impact both nations. In the U.S., many central cancer registries rely on the infrastructure that comes with the Public Health Information Network (PHIN) supported system. The symbiotic relationship of central cancer registries to PHIN systems makes central cancer registry operations vulnerable to the demands and requirements associated with such systems, and therefore supporting multiple messaging interfaces could be costly, influence data transmission and hamper interoperability. For example, any suggested changes in the ELR guide (the Draft Laboratory Standard) could be incompatible with the Current Registry Standard, which would then cause problems not just for central cancer registries in the U.S., but also for the Canadian central cancer registries.

1.1.2The Goal


The NAACCR ELR Messaging Comparison Task Force has developed this comparison document as a resource and a reference document for stakeholders involved in the electronic transmission, and receipt of information from pathology laboratories to central cancer registries. This document lists the differences between the Current Registry Standard, and the Draft Laboratory Standard, specific to electronic laboratory reporting to public health (“The HL7 Version 2.5.1 IG for ELR to Public Health, DSTU, Release 2, US Realm, R 1.1”).
The goal of this work is to inform and alert potential implementers, such as enterprise architects, interface developers, cancer registry administrators, and technical staff of the differences between the Current Registry Standard and the Draft Laboratory Standard. These differences may cause increased development costs or implementation compatibility issues.

1.1.3Audience


This document is intended for developers, analysts, and other users who are involved in the electronic transmission or receipt of pathology laboratory data that are using the NAACCR Standards Volume V, version 4.0. Therefore, readers are expected to be familiar with both the HL7 2.x messaging protocol and NAACCR Standards Volume V. The material presented here is detailed and not intended to be “introductory level material”.

1.1.4 The Scope of this Document


The scope of this document is limited to listing the differences between the Current Registry Standard and the Draft Laboratory Standard, and categorizing the potential impact of each difference. The differences range from minor to major, the latter potentially jeopardizing the flow of data from pathology laboratories to central cancer registries, and the ability of central cancer registries to perform their primary function.

1.2Differences between Volume V, Version 4.0 and ELR R2 (DSTU R1.1, U.S. Realm)





  • The Draft Laboratory Standard is intended for eligible health providers.

  • The Draft Laboratory Standard for Meaningful Use (MU) Stages 1 and 2 is applicable to immunizations and hospital laboratory results of reportable conditions other than cancer and therefore is not applicable to cancer registry requirements.

  • MU Stage 2 and 3 require specific versions of LOINC and SNOMED CT for laboratory reporting. It is known that registry reports from laboratories require other vocabularies (e.g., ICD-O-3).

  • The Current Registry Standard is in wide use in both the U.S. and Canada; the ELR guide is a Draft Laboratory Standard; now is a good time to minimize the differences between the Current Registry Standard and the Draft Laboratory Standard because both are based on HL7 2.5.1 and the latter is required for MU.

    • The Draft Laboratory Standard in its current form would not fully meet requirements for cancer registry pathology data transmission and to harmonize the two models at this time would require a considerable effort.

  • The Current Registry Standard is much more user friendly, and has many critical examples (use case scenarios) which the ELR Draft Laboratory Standard does not have.

  • The Current Registry Standard allows for a stepwise evolution from current ubiquitous narrative text in path reports towards synoptically structured path reports (e.g., is capable of receiving College of American Pathologists’ Electronic Cancer Check Lists (CAP’s eCCs). The ELR Draft Laboratory Standard seems to lack this capability.

  • Many vendors provide a common laboratory information system (LIS) to support pathology laboratories and other laboratories. Requiring significant differences in these otherwise similar systems may dramatically increase costs while raising a question of perceived benefits of differences.

  • Specifications for similar LIS functions should minimize differences that may cause problems in the community. Such differences during the DSTU period may impose significant costs to public health agencies, and laboratories implementing different interfaces. These differences may also result in potential operational issues for cancer registries.

  • Canadian registries, vendors, and LIS would be negatively impacted by US- specific changes to the Current Registry Standard based on the influence of the Draft Laboratory Standard.




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