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Source1

{
  "resourceType": "CodeSystem",
  "id": "graft-pathology-cs",
  "text": {
    "status": "generated",
    "div": "<!-- snip (see above) -->"
  },
  "url": "https://hl7.eu/fhir/ig/hl7.eu.fhir.protect-child/CodeSystem/graft-pathology-cs",
  "version": "0.1.0-ci-build",
  "name": "GraftPathologyCS",
  "title": "Graft Pathology Codes",
  "status": "draft",
  "experimental": true,
  "date": "2026-09-28T06:51:47+00:00",
  "publisher": "Protect Child",
  "contact": [
    {
      "name": "Protect Child",
      "telecom": [
        {
          "system": "url",
          "value": "https://protect-child.eu/"
        }
      ]
    }
  ],
  "description": "Local observation and component codes for graft biopsy scoring: the Banff diagnostic category, the Banff lesion scores, and the liver Banff Rejection Activity Index with its three constituent scores. Neither LOINC nor SNOMED CT carries these.",
  "caseSensitive": true,
  "content": "complete",
  "count": 15,
  "concept": [
    {
      "code": "banff-category",
      "display": "Banff diagnostic category",
      "definition": "Banff 2022 diagnostic category assigned on a kidney allograft biopsy."
    },
    {
      "code": "liver-rai",
      "display": "Banff Rejection Activity Index (liver)",
      "definition": "Total Banff Rejection Activity Index (RAI) for liver allograft rejection, 0–9."
    },
    {
      "code": "banff-g",
      "display": "g – glomerulitis",
      "definition": "Banff lesion score for glomerulitis, graded 0–3."
    },
    {
      "code": "banff-ptc",
      "display": "ptc – peritubular capillaritis",
      "definition": "Banff lesion score for peritubular capillaritis, graded 0–3."
    },
    {
      "code": "banff-i",
      "display": "i – interstitial inflammation",
      "definition": "Banff lesion score for interstitial inflammation, graded 0–3."
    },
    {
      "code": "banff-t",
      "display": "t – tubulitis",
      "definition": "Banff lesion score for tubulitis, graded 0–3."
    },
    {
      "code": "banff-v",
      "display": "v – intimal arteritis",
      "definition": "Banff lesion score for intimal arteritis, graded 0–3."
    },
    {
      "code": "banff-ci",
      "display": "ci – interstitial fibrosis",
      "definition": "Banff lesion score for interstitial fibrosis, graded 0–3."
    },
    {
      "code": "banff-ct",
      "display": "ct – tubular atrophy",
      "definition": "Banff lesion score for tubular atrophy, graded 0–3."
    },
    {
      "code": "banff-cg",
      "display": "cg – transplant glomerulopathy",
      "definition": "Glomerular basement membrane double contours. Banff scores cg1 as cg1a/cg1b; both are recorded here as 1."
    },
    {
      "code": "banff-ah",
      "display": "ah – arteriolar hyalinosis",
      "definition": "Banff lesion score for arteriolar hyalinosis, graded 0–3."
    },
    {
      "code": "banff-mm",
      "display": "mm – mesangial matrix expansion",
      "definition": "Banff lesion score for mesangial matrix expansion, graded 0–3."
    },
    {
      "code": "rai-portal-inflammation",
      "display": "Portal inflammation",
      "definition": "Rejection activity index component for portal inflammation, graded 0–3."
    },
    {
      "code": "rai-bile-duct-inflammation",
      "display": "Bile duct inflammation / damage",
      "definition": "Rejection activity index component for bile duct inflammation / damage, graded 0–3."
    },
    {
      "code": "rai-venous-endothelial-inflammation",
      "display": "Venous endothelial inflammation",
      "definition": "Rejection activity index component for venous endothelial inflammation, graded 0–3."
    }
  ]
}