This code system http://fhir.ch/ig/ch-crl/CodeSystem/nkrs-whogradegroup defines the following codes:
Code | Display | Definition |
1 | Grade group 1 | Gleason score ≤ 6 (≤ 3+3). \r\nOnly individual discrete well-formed glands. |
2 | Grade group 2 | Gleason score 7 (3 + 4). \r\nPredominantly well-formed glands with lesser component of poorly formed/fused/cribriform glands. |
3 | Grade group 3 | Gleason score 7 (4 + 3). \r\nPredominantly poorly formed/fused/cribriform glands with lesser component of well-formed glands. |
4 | Grade group 4 | Gleason score 8 (4 + 4 or 3 + 5 or 5 + 3).\r\nOnly poorly formed/fused/cribriform glands or\r\npredominantly well-formed glands and lesser component lacking glands or\r\npredominantly lacking glands and lesser component of well-formed glands. |
5 | Grade group 5 | Gleason score 9-10. \r\nLack of gland formation (or with necrosis) with or without poorly formed/fused/cribriform glands. |