{
  "resourceType" : "CodeSystem",
  "id" : "WalchClassification",
  "text" : {
    "status" : "generated",
    "div" : "<div xmlns=\"http://www.w3.org/1999/xhtml\"><p class=\"res-header-id\"><b>Generated Narrative: CodeSystem WalchClassification</b></p><a name=\"WalchClassification\"> </a><a name=\"hcWalchClassification\"> </a><p>This case-insensitive code system <code>https://kip.rkkp.dk/fhir/CodeSystem/WalchClassification</code> defines the following codes in an undefined hierarchy:</p><table class=\"codes\"><tr><td><b>Lvl</b></td><td style=\"white-space:nowrap\"><b>Code</b></td><td><b>Display</b></td><td><b>Definition</b></td></tr><tr><td>1</td><td style=\"white-space:nowrap\">type_a<a name=\"WalchClassification-type_a\"> </a></td><td>Type A</td><td>Type A: centered humeral head, concentric wear, no subluxation of the humeral head</td></tr><tr><td>2</td><td style=\"white-space:nowrap\">\u00a0\u00a0type_a1<a name=\"WalchClassification-type_a1\"> </a></td><td>Type A1</td><td>Type A1: minor central erosion</td></tr><tr><td>2</td><td style=\"white-space:nowrap\">\u00a0\u00a0type_a2<a name=\"WalchClassification-type_a2\"> </a></td><td>Type A2</td><td>Type A2: major central erosion, humeral head protruding into the glenoid cavity</td></tr><tr><td>1</td><td style=\"white-space:nowrap\">type_b<a name=\"WalchClassification-type_b\"> </a></td><td>Type B</td><td>Type B: humeral head subluxated posteriorly, biconcave glenoid with asymmetric wear</td></tr><tr><td>2</td><td style=\"white-space:nowrap\">\u00a0\u00a0type_b1<a name=\"WalchClassification-type_b1\"> </a></td><td>Type B1</td><td>Type B1: narrowing of the posterior joint space, subchondral sclerosis, osteophytes</td></tr><tr><td>2</td><td style=\"white-space:nowrap\">\u00a0\u00a0type_b2<a name=\"WalchClassification-type_b2\"> </a></td><td>Type B2</td><td>Type B2: biconcave aspect of the glenoid with posterior rim erosion and retroverted glenoid</td></tr><tr><td>2</td><td style=\"white-space:nowrap\">\u00a0\u00a0type_b3<a name=\"WalchClassification-type_b3\"> </a></td><td>Type B3</td><td>Type B3: monoconcave and posterior wear with &gt;15° retroversion or &gt;70% posterior humeral head subluxation, or both</td></tr><tr><td>1</td><td style=\"white-space:nowrap\">type_c<a name=\"WalchClassification-type_c\"> </a></td><td>Type C</td><td>Type C: Dysplastic glenoid with at least 25° of retroversion not caused by erosion</td></tr><tr><td>2</td><td style=\"white-space:nowrap\">\u00a0\u00a0type_c1<a name=\"WalchClassification-type_c1\"> </a></td><td>Type C1</td><td>Type C1: dysplastic glenoid with &gt;25° retroversion regardless of the erosion</td></tr><tr><td>2</td><td style=\"white-space:nowrap\">\u00a0\u00a0type_c2<a name=\"WalchClassification-type_c2\"> </a></td><td>Type C2</td><td>Type C2: biconcave, posterior bone loss, posterior translation of the humeral head</td></tr><tr><td>1</td><td style=\"white-space:nowrap\">type_d<a name=\"WalchClassification-type_d\"> </a></td><td>Type D</td><td>Type D: glenoid anteversion or anterior humeral head subluxation &lt;40°</td></tr></table></div>"
  },
  "url" : "https://kip.rkkp.dk/fhir/CodeSystem/WalchClassification",
  "version" : "2.19.2",
  "name" : "WalchClassification",
  "title" : "Walch classification",
  "status" : "active",
  "date" : "2022-10-06T00:00:00+02:00",
  "publisher" : "Sundhedsvæsenets Kvalitetsinstitut with Trifork Digital Health A/S",
  "contact" : [{
    "name" : "Sundhedsvæsenets Kvalitetsinstitut with Trifork Digital Health A/S",
    "telecom" : [{
      "system" : "url",
      "value" : "https://trifork.com"
    },
    {
      "system" : "email",
      "value" : "rbk@trifork.com"
    }]
  }],
  "description" : "Walch classification; Link: https://radiopaedia.org/articles/walch-classification-of-glenoid-morphology-1",
  "caseSensitive" : false,
  "content" : "complete",
  "count" : 11,
  "concept" : [{
    "code" : "type_a",
    "display" : "Type A",
    "definition" : "Type A: centered humeral head, concentric wear, no subluxation of the humeral head",
    "concept" : [{
      "code" : "type_a1",
      "display" : "Type A1",
      "definition" : "Type A1: minor central erosion"
    },
    {
      "code" : "type_a2",
      "display" : "Type A2",
      "definition" : "Type A2: major central erosion, humeral head protruding into the glenoid cavity"
    }]
  },
  {
    "code" : "type_b",
    "display" : "Type B",
    "definition" : "Type B: humeral head subluxated posteriorly, biconcave glenoid with asymmetric wear",
    "concept" : [{
      "code" : "type_b1",
      "display" : "Type B1",
      "definition" : "Type B1: narrowing of the posterior joint space, subchondral sclerosis, osteophytes"
    },
    {
      "code" : "type_b2",
      "display" : "Type B2",
      "definition" : "Type B2: biconcave aspect of the glenoid with posterior rim erosion and retroverted glenoid"
    },
    {
      "code" : "type_b3",
      "display" : "Type B3",
      "definition" : "Type B3: monoconcave and posterior wear with >15° retroversion or >70% posterior humeral head subluxation, or both"
    }]
  },
  {
    "code" : "type_c",
    "display" : "Type C",
    "definition" : "Type C: Dysplastic glenoid with at least 25° of retroversion not caused by erosion",
    "concept" : [{
      "code" : "type_c1",
      "display" : "Type C1",
      "definition" : "Type C1: dysplastic glenoid with >25° retroversion regardless of the erosion"
    },
    {
      "code" : "type_c2",
      "display" : "Type C2",
      "definition" : "Type C2: biconcave, posterior bone loss, posterior translation of the humeral head"
    }]
  },
  {
    "code" : "type_d",
    "display" : "Type D",
    "definition" : "Type D: glenoid anteversion or anterior humeral head subluxation <40°"
  }]
}