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

: pLVI Classification

Draft as of 2026-03-29

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<CodeSystem xmlns="http://hl7.org/fhir">
  <id value="plvi-classification"/>
  <language value="en"/>
  <text>
    <status value="generated"/>
    <div xml:lang="en" lang="en"><hr/><p><b>English</b></p><hr/><p class="res-header-id"><b>Generated Narrative: CodeSystem plvi-classification</b></p><a name="plvi-classification"> </a><a name="hcplvi-classification"> </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/plvi-classification</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">plvi-0<a name="plvi-classification-plvi-0"> </a></td><td>pLVI-0: not detected</td><td>No lymphovascular invasion detected</td></tr><tr><td style="white-space:nowrap">plvi-1<a name="plvi-classification-plvi-1"> </a></td><td>pLVI-1: spreading, otherwise unclassified</td><td>Lymphovascular invasion present, otherwise not classified</td></tr><tr><td style="white-space:nowrap">plvi-2<a name="plvi-classification-plvi-2"> </a></td><td>pLVI-2: only in lymphatic vessels and small blood vessels (L)</td><td>Present only in lymphatic vessels and small blood vessels</td></tr><tr><td style="white-space:nowrap">plvi-3<a name="plvi-classification-plvi-3"> </a></td><td>pLVI-3: only in veins (large, thick-walled blood vessels) (V)</td><td>Present only in veins (large, thick-walled blood vessels)</td></tr><tr><td style="white-space:nowrap">plvi-4<a name="plvi-classification-plvi-4"> </a></td><td>pLVI-4: present in both lymphatic vessels and veins (LV)</td><td>Present in both lymphatic vessels and veins</td></tr><tr><td style="white-space:nowrap">plvi-9<a name="plvi-classification-plvi-9"> </a></td><td>pLVI-9: undetectable/unknown</td><td>Lymphovascular invasion status not determined or unknown</td></tr></table></div>
  </text>
  <url value="https://tx.hl7.lt/fhir/CodeSystem/plvi-classification"/>
  <version value="0.0.1"/>
  <name value="PlviClassificationLtLab"/>
  <title value="pLVI Classification"/>
  <status value="draft"/>
  <experimental value="true"/>
  <date value="2026-03-29T11:59:27+00:00"/>
  <publisher value="Lithuanian Medical Library"/>
  <contact>
    <name value="Lithuanian Medical Library"/>
    <telecom>
      <system value="url"/>
      <value value="https://medicinosnk.lt"/>
    </telecom>
    <telecom>
      <system value="email"/>
      <value value="info@medicinosnk.lt"/>
    </telecom>
  </contact>
  <description
               value="Peritumoral lymphovascular invasion (pLVI) 6-level classification for breast cancer pathology."/>
  <jurisdiction>
    <coding>
      <system value="urn:iso:std:iso:3166"/>
      <code value="LT"/>
    </coding>
  </jurisdiction>
  <caseSensitive value="true"/>
  <content value="complete"/>
  <count value="6"/>
  <concept>
    <code value="plvi-0"/>
    <display value="pLVI-0: not detected"/>
    <definition value="No lymphovascular invasion detected"/>
  </concept>
  <concept>
    <code value="plvi-1"/>
    <display value="pLVI-1: spreading, otherwise unclassified"/>
    <definition
                value="Lymphovascular invasion present, otherwise not classified"/>
  </concept>
  <concept>
    <code value="plvi-2"/>
    <display
             value="pLVI-2: only in lymphatic vessels and small blood vessels (L)"/>
    <definition
                value="Present only in lymphatic vessels and small blood vessels"/>
  </concept>
  <concept>
    <code value="plvi-3"/>
    <display
             value="pLVI-3: only in veins (large, thick-walled blood vessels) (V)"/>
    <definition
                value="Present only in veins (large, thick-walled blood vessels)"/>
  </concept>
  <concept>
    <code value="plvi-4"/>
    <display
             value="pLVI-4: present in both lymphatic vessels and veins (LV)"/>
    <definition value="Present in both lymphatic vessels and veins"/>
  </concept>
  <concept>
    <code value="plvi-9"/>
    <display value="pLVI-9: undetectable/unknown"/>
    <definition
                value="Lymphovascular invasion status not determined or unknown"/>
  </concept>
</CodeSystem>