Lithuanian Laboratory Implementation Guide, published by Lithuanian Medical Library. This guide is not an authorized publication; it is the continuous build for version 0.0.1 built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/HL7LT/ig-lt-lab/ and changes regularly. See the Directory of published versions

• Narrative Content
• XML
• JSON

: IHC Expression Level

Draft as of 2026-03-29

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{
  "resourceType" : "CodeSystem",
  "id" : "ihc-expression-level",
  "language" : "en",
  "text" : {
    "status" : "generated",
    "div" : "<div xml:lang=\"en\" lang=\"en\"><hr/><p><b>English</b></p><hr/><p class=\"res-header-id\"><b>Generated Narrative: CodeSystem ihc-expression-level</b></p><a name=\"ihc-expression-level\"> </a><a name=\"hcihc-expression-level\"> </a><div style=\"display: inline-block; background-color: #d9e0e7; padding: 6px; margin: 4px; border: 1px solid #8da1b4; border-radius: 5px; line-height: 60%\"><p style=\"margin-bottom: 0px\">Language: en</p></div><p>This case-sensitive code system <code>https://tx.hl7.lt/fhir/CodeSystem/ihc-expression-level</code> defines the following codes:</p><table class=\"codes\"><tr><td style=\"white-space:nowrap\"><b>Code</b></td><td><b>Display</b></td><td><b>Definition</b></td></tr><tr><td style=\"white-space:nowrap\">negative<a name=\"ihc-expression-level-negative\"> </a></td><td>Negative</td><td>No expression detected</td></tr><tr><td style=\"white-space:nowrap\">weak<a name=\"ihc-expression-level-weak\"> </a></td><td>Weak (+)</td><td>Weak expression (+)</td></tr><tr><td style=\"white-space:nowrap\">moderate<a name=\"ihc-expression-level-moderate\"> </a></td><td>Moderate (++)</td><td>Moderate expression (++)</td></tr><tr><td style=\"white-space:nowrap\">strong<a name=\"ihc-expression-level-strong\"> </a></td><td>Strong (+++)</td><td>Strong expression (+++)</td></tr></table></div>"
  },
  "url" : "https://tx.hl7.lt/fhir/CodeSystem/ihc-expression-level",
  "version" : "0.0.1",
  "name" : "IhcExpressionLevelLtLab",
  "title" : "IHC Expression Level",
  "status" : "draft",
  "experimental" : true,
  "date" : "2026-03-29T11:59:27+00:00",
  "publisher" : "Lithuanian Medical Library",
  "contact" : [
    {
      "name" : "Lithuanian Medical Library",
      "telecom" : [
        {
          "system" : "url",
          "value" : "https://medicinosnk.lt"
        },
        {
          "system" : "email",
          "value" : "info@medicinosnk.lt"
        }
      ]
    }
  ],
  "description" : "Immunohistochemical expression level classification for receptor status assessment.",
  "jurisdiction" : [
    {
      "coding" : [
        {
          "system" : "urn:iso:std:iso:3166",
          "code" : "LT"
        }
      ]
    }
  ],
  "caseSensitive" : true,
  "content" : "complete",
  "count" : 4,
  "concept" : [
    {
      "code" : "negative",
      "display" : "Negative",
      "definition" : "No expression detected"
    },
    {
      "code" : "weak",
      "display" : "Weak (+)",
      "definition" : "Weak expression (+)"
    },
    {
      "code" : "moderate",
      "display" : "Moderate (++)",
      "definition" : "Moderate expression (++)"
    },
    {
      "code" : "strong",
      "display" : "Strong (+++)",
      "definition" : "Strong expression (+++)"
    }
  ]
}