Lithuanian Breast Diagnostics 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-breast/ and changes regularly. See the Directory of published versions

• Narrative Content
• XML
• JSON

: SNOMED Breast Extension

Draft as of 2026-03-29

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{
  "resourceType" : "CodeSystem",
  "id" : "snomed-breast-extension",
  "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 snomed-breast-extension</b></p><a name=\"snomed-breast-extension\"> </a><a name=\"hcsnomed-breast-extension\"> </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/snomed-breast-extension</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\">parenchyma-fatty<a name=\"snomed-breast-extension-parenchyma-fatty\"> </a></td><td>Homogeneous adipose tissue</td><td>Ultrasound breast parenchyma structure: homogeneous adipose tissue</td></tr><tr><td style=\"white-space:nowrap\">parenchyma-fibroglandular<a name=\"snomed-breast-extension-parenchyma-fibroglandular\"> </a></td><td>Homogeneous fibroglandular</td><td>Ultrasound breast parenchyma structure: homogeneous fibroglandular tissue</td></tr><tr><td style=\"white-space:nowrap\">parenchyma-heterogeneous<a name=\"snomed-breast-extension-parenchyma-heterogeneous\"> </a></td><td>Heterogeneous</td><td>Ultrasound breast parenchyma structure: heterogeneous tissue</td></tr><tr><td style=\"white-space:nowrap\">ducts-normal<a name=\"snomed-breast-extension-ducts-normal\"> </a></td><td>Ducts not expanded</td><td>Breast duct condition: ducts not expanded (normal)</td></tr><tr><td style=\"white-space:nowrap\">ducts-expanded<a name=\"snomed-breast-extension-ducts-expanded\"> </a></td><td>Ducts expanded</td><td>Breast duct condition: ducts expanded (dilated)</td></tr></table></div>"
  },
  "url" : "https://tx.hl7.lt/fhir/CodeSystem/snomed-breast-extension",
  "version" : "0.0.1",
  "name" : "SnomedBreastExtension",
  "title" : "SNOMED Breast Extension",
  "status" : "draft",
  "experimental" : true,
  "date" : "2026-03-29T12:06:43+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" : "Extension codes for breast diagnostics concepts not yet available in SNOMED CT. These codes are intended to be replaced by official SNOMED CT codes when they become available.",
  "jurisdiction" : [
    {
      "coding" : [
        {
          "system" : "urn:iso:std:iso:3166",
          "code" : "LT"
        }
      ]
    }
  ],
  "caseSensitive" : true,
  "content" : "complete",
  "count" : 5,
  "concept" : [
    {
      "code" : "parenchyma-fatty",
      "display" : "Homogeneous adipose tissue",
      "definition" : "Ultrasound breast parenchyma structure: homogeneous adipose tissue"
    },
    {
      "code" : "parenchyma-fibroglandular",
      "display" : "Homogeneous fibroglandular",
      "definition" : "Ultrasound breast parenchyma structure: homogeneous fibroglandular tissue"
    },
    {
      "code" : "parenchyma-heterogeneous",
      "display" : "Heterogeneous",
      "definition" : "Ultrasound breast parenchyma structure: heterogeneous tissue"
    },
    {
      "code" : "ducts-normal",
      "display" : "Ducts not expanded",
      "definition" : "Breast duct condition: ducts not expanded (normal)"
    },
    {
      "code" : "ducts-expanded",
      "display" : "Ducts expanded",
      "definition" : "Breast duct condition: ducts expanded (dilated)"
    }
  ]
}