| Relation Name/Additional Label | Expanded Form | Count |
| CHD/isa | has child relationship in a Metathesaurus source vocabulary /Is a | 398002 |
| PAR/inverse_isa | has parent relationship in a Metathesaurus source vocabulary /Inverse is a | 398002 |
| RB/inverse_isa | has a broader relationship/Inverse is a | 262766 |
| RN/isa | has a narrower relationship/Is a | 262766 |
| SY/same_as | source asserted synonymy./Same as | 130952 |
| RO/finding_site_of | has relationship other than synonymous, narrower, or broader/Finding site of | 117984 |
| RO/has_finding_site | has relationship other than synonymous, narrower, or broader/Has finding site | 117984 |
| RO/laterality_of | has relationship other than synonymous, narrower, or broader/Laterality of | 101755 |
| RO/has_laterality | has relationship other than synonymous, narrower, or broader/Has laterality | 101755 |
| RO/associated_with | has relationship other than synonymous, narrower, or broader/Associated with | 47436 |
| RO/has_associated_morphology | has relationship other than synonymous, narrower, or broader/Has associated morphology | 42562 |
| RO/associated_morphology_of | has relationship other than synonymous, narrower, or broader/Associated morphology of | 42562 |
| RO/has_finding_method | has relationship other than synonymous, narrower, or broader/Has finding method | 38557 |
| RO/finding_method_of | has relationship other than synonymous, narrower, or broader/Finding method of | 38557 |
| RO/direct_procedure_site_of | has relationship other than synonymous, narrower, or broader/Direct procedure site of | 19497 |
| RO/has_direct_procedure_site | has relationship other than synonymous, narrower, or broader/Has direct procedure site | 19497 |
| RO/specimen_of | has relationship other than synonymous, narrower, or broader/Specimen of | 12224 |
| RO/has_specimen | has relationship other than synonymous, narrower, or broader/Has specimen | 12224 |
| RO/interprets | has relationship other than synonymous, narrower, or broader/Interprets | 11123 |
| RO/is_interpreted_by | has relationship other than synonymous, narrower, or broader/Is interpreted by | 11123 |
| RO/has_focus | has relationship other than synonymous, narrower, or broader/Has focus | 10931 |
| RO/focus_of | has relationship other than synonymous, narrower, or broader/Focus of | 10931 |
| RO/has_procedure_site | has relationship other than synonymous, narrower, or broader/Has procedure site | 9112 |
| RO/procedure_site_of | has relationship other than synonymous, narrower, or broader/Procedure site of | 9112 |
| RO/has_active_ingredient | has relationship other than synonymous, narrower, or broader/Has active ingredient | 8133 |
| RO/active_ingredient_of | has relationship other than synonymous, narrower, or broader/Active ingredient of | 8133 |
| RO/component_of | has relationship other than synonymous, narrower, or broader/Component of | 7769 |
| RO/has_component | has relationship other than synonymous, narrower, or broader/Has component | 7769 |
| RO/causative_agent_of | has relationship other than synonymous, narrower, or broader/Causative agent of | 4748 |
| RO/has_causative_agent | has relationship other than synonymous, narrower, or broader/Has causative agent | 4748 |
| RO/has_indirect_procedure_site | has relationship other than synonymous, narrower, or broader/Has indirect procedure site | 4177 |
| RO/indirect_procedure_site_of | has relationship other than synonymous, narrower, or broader/Indirect procedure site of | 4177 |
| RO/has_method | has relationship other than synonymous, narrower, or broader/Has method | 3059 |
| RO/method_of | has relationship other than synonymous, narrower, or broader/Method of | 3059 |
| RO/has_measurement_method | has relationship other than synonymous, narrower, or broader/Has measurement method | 2951 |
| RO/measurement_method_of | has relationship other than synonymous, narrower, or broader/Measurement method of | 2951 |
| RO/substance_used_by | has relationship other than synonymous, narrower, or broader/Substance used by | 2779 |
| RO/uses_substance | has relationship other than synonymous, narrower, or broader/Uses substance | 2779 |
| RO/direct_substance_of | has relationship other than synonymous, narrower, or broader/Direct substance of | 2392 |
| RO/has_direct_substance | has relationship other than synonymous, narrower, or broader/Has direct substance | 2392 |
| RO/has_interpretation | has relationship other than synonymous, narrower, or broader/Has interpretation | 2333 |
| RO/interpretation_of | has relationship other than synonymous, narrower, or broader/Interpretation of | 2333 |
| RO/device_used_by | has relationship other than synonymous, narrower, or broader/Device used by | 2053 |
| RO/uses_device | has relationship other than synonymous, narrower, or broader/Uses device | 2053 |
| RO/has_subject_relationship_context | has relationship other than synonymous, narrower, or broader/Has subject relationship context | 2041 |
| RO/subject_relationship_context_of | has relationship other than synonymous, narrower, or broader/Subject relationship context of | 2041 |
| RO/has_clinical_course | has relationship other than synonymous, narrower, or broader/Has clinical course | 1525 |
| RO/clinical_course_of | has relationship other than synonymous, narrower, or broader/Clinical course of | 1525 |
| RO/has_associated_finding | has relationship other than synonymous, narrower, or broader/Has associated finding | 1480 |
| RO/associated_finding_of | has relationship other than synonymous, narrower, or broader/Associated finding of | 1480 |
| RO/procedure_morphology_of | has relationship other than synonymous, narrower, or broader/Procedure morphology of | 1468 |
| RO/has_procedure_morphology | has relationship other than synonymous, narrower, or broader/Has procedure morphology | 1468 |
| RO/has_direct_device | has relationship other than synonymous, narrower, or broader/Has direct device | 1450 |
| RO/direct_device_of | has relationship other than synonymous, narrower, or broader/Direct device of | 1450 |
| RO/property_of | has relationship other than synonymous, narrower, or broader/Property of | 1035 |
| RO/has_property | has relationship other than synonymous, narrower, or broader/Has property | 1035 |
| RO/due_to | has relationship other than synonymous, narrower, or broader/Due to | 901 |
| RO/cause_of | has relationship other than synonymous, narrower, or broader/Cause of | 901 |
| RO/occurs_after | has relationship other than synonymous, narrower, or broader/Occurs after | 834 |
| RO/occurs_before | has relationship other than synonymous, narrower, or broader/Occurs before | 834 |
| RO/has_associated_observation | has relationship other than synonymous, narrower, or broader/Has associated observation | 792 |
| RO/associated_observation_of | has relationship other than synonymous, narrower, or broader/Associated observation of | 792 |
| RO/has_severity | has relationship other than synonymous, narrower, or broader/Has severity | 629 |
| RO/severity_of | has relationship other than synonymous, narrower, or broader/Severity of | 629 |
| RO/surgical_approach_of | has relationship other than synonymous, narrower, or broader/surgical approach of | 535 |
| RO/has_surgical_approach | has relationship other than synonymous, narrower, or broader/has surgical approach | 535 |
| RO/intent_of | has relationship other than synonymous, narrower, or broader/Intent of | 496 |
| RO/has_intent | has relationship other than synonymous, narrower, or broader/Has intent | 496 |
| RO/has_access | has relationship other than synonymous, narrower, or broader/Has access | 409 |
| RO/access_of | has relationship other than synonymous, narrower, or broader/Access of | 409 |
| RO/has_occurrence | has relationship other than synonymous, narrower, or broader/Has occurrence | 397 |
| RO/occurs_in | has relationship other than synonymous, narrower, or broader/Occurs in | 397 |
| RO/direct_morphology_of | has relationship other than synonymous, narrower, or broader/Direct morphology of | 355 |
| RO/has_direct_morphology | has relationship other than synonymous, narrower, or broader/Has direct morphology | 355 |
| RO/time_aspect_of | has relationship other than synonymous, narrower, or broader/Time aspect of | 213 |
| RO/has_time_aspect | has relationship other than synonymous, narrower, or broader/Has time aspect | 213 |
| RO/scale_type_of | has relationship other than synonymous, narrower, or broader/Scale type of | 183 |
| RO/has_scale_type | has relationship other than synonymous, narrower, or broader/Has scale type | 183 |
| RO/uses_access_device | has relationship other than synonymous, narrower, or broader/Uses access device | 179 |
| RO/access_device_used_by | has relationship other than synonymous, narrower, or broader/Access device used by | 179 |
| RO/has_associated_procedure | has relationship other than synonymous, narrower, or broader/Has associated procedure | 168 |
| RO/associated_procedure_of | has relationship other than synonymous, narrower, or broader/Associated procedure of | 168 |
| RO/place_traveled_to | has relationship other than synonymous, narrower, or broader/Place traveled to or resided in | 164 |
| RO/place_traveled_from | has relationship other than synonymous, narrower, or broader/Place traveled from | 164 |
| RO/has_procedure_device | has relationship other than synonymous, narrower, or broader/Has procedure device | 109 |
| RO/procedure_device_of | has relationship other than synonymous, narrower, or broader/Procedure device of | 109 |
| RO/priority_of | has relationship other than synonymous, narrower, or broader/Priority of | 92 |
| RO/has_priority | has relationship other than synonymous, narrower, or broader/Has priority | 92 |
| RO/has_recipient_category | has relationship other than synonymous, narrower, or broader/Has recipient category | 58 |
| RO/recipient_category_of | has relationship other than synonymous, narrower, or broader/Recipient category of | 58 |
| RO/indirect_device_of | has relationship other than synonymous, narrower, or broader/Indirect device of | 44 |
| RO/has_indirect_device | has relationship other than synonymous, narrower, or broader/Has indirect device | 44 |
| RO/has_route_of_administration | has relationship other than synonymous, narrower, or broader/Has route of administration | 36 |
| RO/route_of_administration_of | has relationship other than synonymous, narrower, or broader/Route of administration of | 36 |
| RO/inverse_during | has relationship other than synonymous, narrower, or broader/Inverse during | 30 |
| RO/during | has relationship other than synonymous, narrower, or broader/During | 30 |
| RO/has_finding_informer | has relationship other than synonymous, narrower, or broader/Has finding informer | 25 |
| RO/finding_informer_of | has relationship other than synonymous, narrower, or broader/Finding informer of | 25 |
| RO/episodicity_of | has relationship other than synonymous, narrower, or broader/Episodicity of | 24 |
| RO/has_episodicity | has relationship other than synonymous, narrower, or broader/Has episodicity | 24 |
| RO/has_pathological_process | has relationship other than synonymous, narrower, or broader/Has pathological process | 24 |
| RO/pathological_process_of | has relationship other than synonymous, narrower, or broader/Pathological process of | 24 |
| RO/specimen_source_topography_of | has relationship other than synonymous, narrower, or broader/specimen source topography of | 21 |
| RO/has_specimen_source_topography | has relationship other than synonymous, narrower, or broader/Has specimen source topography | 21 |
| RO/has_dose_form | has relationship other than synonymous, narrower, or broader/Has dose form | 17 |
| RO/dose_form_of | has relationship other than synonymous, narrower, or broader/Dose form of | 17 |
| RO/has_revision_status | has relationship other than synonymous, narrower, or broader/Has revision status | 13 |
| RO/revision_status_of | has relationship other than synonymous, narrower, or broader/Revision status of | 13 |
| RO/has_indirect_morphology | has relationship other than synonymous, narrower, or broader/Has indirect morphology | 8 |
| RO/has_specimen_procedure | has relationship other than synonymous, narrower, or broader/Has specimen procedure | 8 |
| RO/indirect_morphology_of | has relationship other than synonymous, narrower, or broader/Indirect morphology of | 8 |
| RO/specimen_procedure_of | has relationship other than synonymous, narrower, or broader/Specimen procedure of | 8 |
| RO/grade_of | has relationship other than synonymous, narrower, or broader/grade of | 6 |
| RO/has_grade | has relationship other than synonymous, narrower, or broader/has grade | 6 |
| RO/temporal_context_of | has relationship other than synonymous, narrower, or broader/Temporal context of | 6 |
| RO/uses_energy | has relationship other than synonymous, narrower, or broader/Uses energy | 6 |
| RO/has_temporal_context | has relationship other than synonymous, narrower, or broader/Has temporal context | 6 |
| RO/energy_used_by | has relationship other than synonymous, narrower, or broader/Energy used by | 6 |
| RO/has_procedure_context | has relationship other than synonymous, narrower, or broader/Has procedure context | 3 |
| RO/procedure_context_of | has relationship other than synonymous, narrower, or broader/Procedure context of | 3 |
| RO/has_finding_context | has relationship other than synonymous, narrower, or broader/Has finding context | 1 |
| RO/definitional_manifestation_of | has relationship other than synonymous, narrower, or broader/Definitional manifestation of | 1 |
| RO/has_definitional_manifestation | has relationship other than synonymous, narrower, or broader/Has definitional manifestation | 1 |
| RO/finding_context_of | has relationship other than synonymous, narrower, or broader/Finding context of | 1 |
| RO/specimen_substance_of | has relationship other than synonymous, narrower, or broader/Specimen substance of | 1 |
| RO/has_specimen_substance | has relationship other than synonymous, narrower, or broader/Has specimen substance | 1 |
