CH_CRL (v0.2.1)
This page is part of the CH-CRL (R4) (v0.2.1: STU) based on FHIR R4. This is the current published version. For a full list of available versions, see the Directory of published versions 
The data item records regional lymph nodes involvement based on clinical investigation, imaging, endoscopy, biopsy or surgical exploration. cN (Variable number: 4.4) in 'NATIONAL CANCER DATA DICTIONARY, V 1.1, Part A, BASIC VARIABLES for Adults, Adolescents, and Children' see Nationale Krebsregistrierungsstelle > Partner im Gesundheitswesen > Information, Grundlagen und Datenstruktur zum KRG.
This code system http://fhir.ch/ig/ch-crl/CodeSystem/nkrs-cn defines the following codes:
| Code | Display | Definition |
| X | cNX | |
| 0 | cN0 | |
| 1 | cN1 | |
| 1a | cN1a | |
| 1b | cN1b | |
| 1c | cN1c | |
| 2 | cN2 | |
| 2a | cN2a | |
| 2b | cN2b | |
| 2c | cN2c | |
| 3 | cN3 | |
| 3a | cN3a | |
| 3b | cN3b | |
| 3c | cN3c |