# Conjunction and Disjunction - Valid Expressions

<table data-header-hidden data-full-width="true"><thead><tr><th>Expression Constraint</th><th>Precoordinated</th><th>Postcoordinated</th></tr></thead><tbody><tr><td>&#x3C; 19829001 | Disorder of lung| AND &#x3C; 301867009 | Edema of trunk|</td><td>233709006 | Toxic pulmonary edema| 61233003 | Silo-fillers’ disease|</td><td>233709006 | Toxic pulmonary edema| : 116676008 | Associated morphology| = 40829002 | Acute edema| , 363698007 | Finding site| = 278985004 | Fissure of right lung|</td></tr><tr><td>&#x3C; 19829001 | Disorder of lung| OR &#x3C; 301867009 | Edema of trunk|</td><td>363358000 | Malignant tumour of lung| 19242006 | Pulmonary edema|</td><td>233709006 | Toxic pulmonary edema| : 116676008 | Associated morphology| = 40829002 | Acute edema|</td></tr><tr><td>&#x3C; 19829001 | Disorder of lung| AND ^ 700043003 | Example problem list concepts reference set|</td><td>1001000119102 | Pulmonary embolism with pulmonary infarction|</td><td><em>(none)</em></td></tr><tr><td>&#x3C; 404684003 | Clinical finding| : 363698007 | Finding site| = &#x3C;&#x3C; 39057004 | Pulmonary valve structure| AND 116676008 | Associated morphology| = &#x3C;&#x3C; 415582006 | Stenosis|</td><td>91442002 | Rheumatic pulmonary valve stenosis| 86299006 | Tetralogy of Fallot|</td><td>56786000 | Pulmonic valve stenosis| : 363698007 | Finding site| = 90318009 | Structure of anulus fibrosus of pulmonary artery| , 116676008 | Associated morphology| = 88015002 | Partial stenosis|</td></tr><tr><td>&#x3C; 404684003 | Clinical finding| : 116676008 | Associated morphology| = &#x3C;&#x3C; 55641003 | Infarct| OR 42752001 | Due to| = &#x3C;&#x3C; 22298006 | Myocardial infarction|</td><td>45456005 | Renal infarct|</td><td>95281009 | Sudden cardiac death| : 42752001 | Due to| = 22298006 | Myocardial infarction| 703326006 | Mitral regurgitation due to acute myocardial infarction|</td></tr><tr><td>&#x3C; 404684003 | Clinical finding| : { 363698007 | Finding site| = &#x3C;&#x3C; 39057004 | Pulmonary valve structure| , 116676008 | Associated morphology| = &#x3C;&#x3C; 415582006 | Stenosis| } OR { 363698007 | Finding site| = &#x3C;&#x3C; 53085002 | Right ventricular structure| , 116676008 | Associated morphology| = &#x3C;&#x3C; 56246009 | Hypertrophy| }</td><td>85971001 | Rheumatic pulmonary valve stenosis with insufficiency| 86299006 | Tetralogy of Fallot|</td><td>56786000 | Pulmonic valve stenosis| : 363698007 | Finding site| = 90318009 | Structure of anulus fibrosus of pulmonary artery| , 116676008 | Associated morphology| = 88015002 | Partial stenosis|</td></tr><tr><td>^ 450990004 | Adverse drug reactions reference set for GP/FP health issue| : 246075003 | Causative agent| = (&#x3C; 373873005 | Pharmaceutical / biologic product| OR &#x3C; 105590001 | Substance| )</td><td>294811002 | Corticotrophic hormone allergy|</td><td>293584003 | Paracetamol allergy| 293585002 | Salicylate allergy|</td></tr><tr><td>&#x3C; 404684003 | Clinical finding| : 116676008 | Associated morphology| = (&#x3C;&#x3C; 56208002 | Ulcer| AND &#x3C;&#x3C; 50960005 | Hemorrhage| )</td><td>12847006 | Acute duodenal ulcer with hemorrhage|</td><td>64572001 | Disease| : { 116676008 | Associated morphology| = 55075001 | Bleeding ulcer| , 363698007 | Finding site| = 14374004 | Structure of lymphatic vessel of oesophagus| }</td></tr></tbody></table>

{% hint style="info" %}
Where necessary, these examples make some assumptions about the membership of the example reference sets.
{% endhint %}

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