| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group | 
| Operation for pulmonary arteriovenous malformation | Procedure site | False | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 1 | 
| Embolization of pulmonary arteriovenous malformation | Procedure site - Indirect | False | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 1 | 
| Pulmonary blood vessel injury | Finding site | True | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 1 | 
| Pulmonary thrombosis | Finding site | True | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 1 | 
| Pulmonary capillary hemangiomatosis | Finding site | False | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 1 | 
| Thromboembolic pulmonary hypertension | Finding site | True | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 1 | 
| Intrapulmonary arteriovenous fistula | Finding site | False | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 1 | 
| Ligation of pulmonary arteriovenous malformation | Procedure site - Indirect | True | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 1 | 
| Angiography of pulmonary blood vessel | Procedure site - Direct | True | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 1 | 
| Multiple peripheral pulmonary artery stenoses | Finding site | True | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 1 | 
| Familial pulmonary capillary hemangiomatosis | Finding site | False | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 1 | 
| Pulmonary vessel injury, unspecified | Finding site | False | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 1 | 
| Pulmonary vessel injury NOS | Finding site | False | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 1 | 
| Magnetic resonance imaging of pulmonary perfusion | Procedure site - Direct | False | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 1 | 
| Magnetic resonance imaging of pulmonary perfusion | Procedure site - Direct | True | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 1 | 
| Embolization of pulmonary arteriovenous malformation | Procedure site - Indirect | False | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 1 | 
| Stricture of pulmonary vessel | Finding site | True | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 1 | 
| Pulmonary arteriovenous malformation | Finding site | True | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 1 | 
| Rupture of pulmonary vessel | Finding site | True | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 1 | 
| Infarction of lung due to iatrogenic pulmonary embolism | Finding site | False | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 4 | 
| Arteriovenous fistula of pulmonary vessels | Finding site | True | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 1 | 
| Portopulmonary hypertension | Finding site | False | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier |  | 
| Multiple peripheral pulmonary artery stenoses | Finding site | False | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 1 | 
| Pulmonary ventilation-perfusion study by radioactive nitrogen | Procedure site - Direct | True | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 1 | 
| Pulmonary ventilation perfusion study | Procedure site - Direct | True | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 1 | 
| Pulmonary ventilation-perfusion study by radioactive carbon | Procedure site - Direct | True | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 1 | 
| Pulmonary ventilation-perfusion study by radioactive oxygen | Procedure site - Direct | True | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 1 | 
| Pulmonary ventilation-perfusion study by radioactive krypton | Procedure site - Direct | True | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 1 | 
| Pulmonary ventilation-perfusion study by radioactive xenon | Procedure site - Direct | True | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 1 | 
| Pulmonary perfusion imaging, gaseous, with ventilation, rebreathing and washout | Procedure site - Direct | True | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 1 | 
| Hypoperfusion of right pulmonary artery due to preferential flow to left pulmonary artery | Finding site | True | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 1 | 
| Hypoperfusion of left pulmonary artery due to preferential flow to right pulmonary artery | Finding site | True | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 1 | 
| Ductus arteriosus dependent pulmonary circulation | Finding site | True | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 1 | 
| Post-capillary pulmonary hypertension | Finding site | True | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 1 | 
| Precapillary pulmonary hypertension | Finding site | True | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 1 | 
| Pulmonary veno-occlusive disease and/or pulmonary capillary hemangiomatosis | Finding site | False | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 1 | 
| Pulmonary hypertension due to lung disease and/or hypoxia | Finding site | True | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 1 | 
| Pulmonary hypertension due to chronic obstructive pulmonary disease | Finding site | True | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 1 | 
| Pulmonary hypertension due to interstitial lung disease | Finding site | True | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 1 | 
| Pulmonary hypertension due to pulmonary disease with mixed restrictive and obstructive pattern | Finding site | True | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 1 | 
| Pulmonary hypertension due to sleep-disordered breathing | Finding site | True | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 1 | 
| Pulmonary hypertension due to alveolar hypoventilation disorder | Finding site | True | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 2 | 
| Pulmonary hypertension due to developmental abnormality of the lung | Finding site | True | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 1 | 
| Pulmonary hypertension due to hematological disorder | Finding site | True | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 1 | 
| Pulmonary hypertension due to myeloproliferative disorder | Finding site | True | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 2 | 
| Pulmonary hypertension due to post-splenectomy hematological disorder | Finding site | True | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 2 | 
| Pulmonary hypertension in systemic disorder | Finding site | True | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 1 | 
| Pulmonary hypertension in sarcoidosis | Finding site | True | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 2 | 
| Pulmonary hypertension in Langerhans cell histiocytosis | Finding site | True | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 2 | 
| Pulmonary hypertension in lymphangioleiomyomatosis | Finding site | True | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 1 | 
| Pulmonary hypertension in neurofibromatosis | Finding site | True | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 3 | 
| Pulmonary hypertension due to vasculitis | Finding site | True | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 2 | 
| Pulmonary capillaritis | Finding site | False | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 1 | 
| Congenital pulmonary arteriovenous aneurysm | Finding site | False | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 3 | 
| Congenital pulmonary arteriovenous aneurysm | Finding site | False | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 4 | 
| Entire pulmonary blood vessel | Is a | True | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier |  | 
| Congenital pulmonary arteriovenous aneurysm | Finding site | True | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 1 | 
| Hyperuricemia, pulmonary hypertension, renal failure, alkalosis syndrome | Finding site | True | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 3 | 
| Structure of artery of pulmonary circulation | Is a | True | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier |  | 
| Pulmonary capillary hemangiomatosis | Finding site | False | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 2 | 
| Familial pulmonary capillary hemangiomatosis | Finding site | False | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 2 | 
| Lymphomatoid granulomatosis of lung | Finding site | True | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 1 | 
| Pulmonary capillaritis | Finding site | True | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 2 | 
| Malignant lymphomatoid granulomatosis of lung | Finding site | True | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 1 | 
| Mild pulmonary hypertension | Finding site | True | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 1 | 
| Moderate pulmonary hypertension | Finding site | True | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 1 | 
| Severe pulmonary hypertension | Finding site | True | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 1 | 
| Single photon emission computed tomography with computed tomography of perfusion of lung | Procedure site - Direct | True | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 1 | 
| Single photon emission computed tomography of ventilation and perfusion of lung | Procedure site - Direct | True | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 2 | 
| Single photon emission computed tomography of perfusion of lung | Procedure site - Direct | True | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 1 | 
| Arteriovenous fistula of pulmonary vessels following superior cavopulmonary anastomosis | Finding site | True | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 1 | 
| Arteriovenous malformation of pulmonary vessels following cavopulmonary anastomosis | Finding site | True | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 1 | 
| Malignant lymphomatoid granulomatosis grade 3 of lung | Finding site | True | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 1 | 
| High altitude pulmonary hypertension | Finding site | True | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 1 | 
| Pulmonary hypertension due to developmental abnormality | Finding site | True | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 1 | 
| Pulmonary hypertension due to pulmonary disease with mixed restrictive and obstructive patterns | Finding site | False | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 1 | 
| Pulmonary perfusion study | Procedure site - Direct | True | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 1 | 
| Pulmonary perfusion imaging, particulate | Procedure site - Direct | True | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 1 | 
| Lung perfusion study with Krypton 81m | Procedure site - Direct | True | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 2 | 
| Pulmonary perfusion imaging, gaseous | Procedure site - Direct | True | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 1 | 
| Magnetic resonance imaging pulmonary perfusion scan (procedure) | Procedure site - Direct | False | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 2 | 
| Magnetic resonance imaging pulmonary perfusion scan (procedure) | Procedure site - Direct | False | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 1 | 
| [X]Other diseases of pulmonary vessels | Finding site | False | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier |  | 
| Chronic pulmonary heart disease NOS | Finding site | False | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier |  | 
| Other pulmonary circulation disease | Finding site | False | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier |  | 
| Other specified pulmonary circulation disease NOS | Finding site | False | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier |  | 
| Pulmonary vessel injury, unspecified | Finding site | False | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 1 | 
| Pulmonary vessel injury NOS | Finding site | False | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 1 | 
| Other chronic pulmonary heart disease NOS | Finding site | False | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier |  | 
| Other specified pulmonary circulation disease | Finding site | False | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier |  | 
| Other chronic pulmonary heart disease | Finding site | False | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier |  | 
| Other pulmonary circulation disease NOS | Finding site | False | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier |  | 
| Pulmonary circulation disease NOS | Finding site | False | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier |  | 
| Acute pulmonary heart disease NOS | Finding site | False | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier |  | 
| Ventilation perfusion quotient scan | Procedure site - Direct | True | Structure of pulmonary blood vessel | Inferred relationship | Existential restriction modifier | 1 |