| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group | 
| Intrathoracic organ | Is a | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier |  | 
| Intrathoracic cardiovascular structure | Is a | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier |  | 
| Structure of intrathoracic lymphatic system | Is a | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier |  | 
| Structure of region of thoracic cavity | Is a | True | Thoracic cavity structure | Inferred relationship | Existential restriction modifier |  | 
| Structure of thoracic viscus | Is a | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier |  | 
| Pleural membrane structure | Is a | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier |  | 
| Structure of left thoracic cavity | Is a | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier |  | 
| Structure of right thoracic cavity | Is a | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier |  | 
| Diaphragm structure | Is a | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier |  | 
| Thoracic esophagus structure | Is a | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier |  | 
| Thoracic outlet structure | Is a | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier |  | 
| Structure of pulmonary sulcus of thorax | Is a | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier |  | 
| Mediastinal structure | Is a | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier |  | 
| Lower respiratory tract structure | Is a | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier |  | 
| Exploratory median sternotomy | Procedure site | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier | 2 | 
| Minithoracotomy | Procedure site | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier | 2 | 
| Laceration of heart with open wound into thorax AND with penetration of heart chambers | Finding site | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier | 3 | 
| Disorder of soft tissue of thoracic cavity | Finding site | True | Thoracic cavity structure | Inferred relationship | Existential restriction modifier | 1 | 
| Injury of thoracic cavity | Finding site | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier | 1 | 
| Computed tomography of intrathoracic structures | Procedure site | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier | 1 | 
| Echography of chest, B-scan with image documentation | Procedure site | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier |  | 
| Injury of bronchus with open wound into thoracic cavity | Finding site | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier | 1 | 
| Ultrasonography of thorax | Procedure site | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier |  | 
| Exploratory thoracotomy | Procedure site | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier | 2 | 
| Ventriculopleural shunt with valve | Procedure site | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier |  | 
| Internal injury of chest | Finding site | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier | 3 | 
| Crushing injury of chest | Finding site | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier | 6 | 
| Injury of multiple intrathoracic organs without open wound into cavity | Finding site | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier | 6 | 
| Doppler flow mapping of thorax | Procedure site | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier |  | 
| Injury of lung with open wound into thorax | Finding site | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier | 2 | 
| Open wound of cervical esophagus with complication | Finding site | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier | 2 | 
| Injury of multiple intrathoracic organs with open wound into cavity | Finding site | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier | 2 | 
| Echography of chest, real time with image documentation | Procedure site | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier |  | 
| Injury of diaphragm with open wound into cavity | Finding site | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier | 2 | 
| Crushed chest with open wound into thoracic cavity | Finding site | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier | 1 | 
| Crushed chest with open wound into thoracic cavity | Finding site | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier | 1 | 
| Injury of esophagus with open wound into thoracic cavity | Finding site | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier | 2 | 
| Echography of chest, B-scan | Procedure site | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier |  | 
| Cerebral ventricular to thoracic cavity shunt | Procedure site | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier |  | 
| Echography of chest, A-mode | Procedure site | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier |  | 
| Open wound of cervical esophagus without complication | Finding site | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier | 2 | 
| Neoplasm of uncertain behavior of pleura, thymus and mediastinum | Finding site | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier |  | 
| Chest wall, pleura and diaphragm operations | Procedure site | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier |  | 
| Infection of lower respiratory tract and mediastinum | Finding site | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier |  | 
| Exploratory thoracotomy NEC | Procedure site | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier | 2 | 
| Other specified operations on chest wall, pleura or diaphragm | Procedure site | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier |  | 
| Chest wall, pleura and diaphragm operations NOS | Procedure site | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier |  | 
| Crushed chest without open wound into thoracic cavity | Finding site | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier | 1 | 
| Other and unspecified intrathoracic organ injury | Finding site | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier | 1 | 
| Closed injury to other intrathoracic structure | Finding site | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier | 1 | 
| Closed injury to other intrathoracic structure not otherwise specified | Finding site | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier | 1 | 
| Open injury to other intrathoracic structure | Finding site | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier | 1 | 
| Open injury to other intrathoracic structure not otherwise specified | Finding site | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier | 1 | 
| Intrathoracic organ injury NOS | Finding site | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier | 1 | 
| [X]Injury of other specified intrathoracic organs | Finding site | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier | 1 | 
| [X]Injury of unspecified intrathoracic organ | Finding site | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier | 1 | 
| Thoracoceloschisis | Finding site | True | Thoracic cavity structure | Inferred relationship | Existential restriction modifier | 1 | 
| Crushed chest with open wound into thoracic cavity | Finding site | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier | 1 | 
| Laceration of heart with open wound into thorax AND with penetration of heart chambers | Finding site | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier | 5 | 
| Entire pleura | Is a | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier |  | 
| Total cavopulmonary connection | Procedure site | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier |  | 
| Caval-pulmonary artery anastomosis | Procedure site | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier |  | 
| Laceration of lung with open wound into thorax | Finding site | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier | 2 | 
| Traumatic pneumohemothorax with open wound into thorax | Finding site | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier | 1 | 
| Anastomosis of intrathoracic artery | Procedure site | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier |  | 
| Crushed chest without open wound into thoracic cavity | Finding site | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier | 2 | 
| Ventriculopleural shunt with valve | Procedure site | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier |  | 
| Empyema with thoracic fistula NOS | Finding site | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier |  | 
| Heart laceration with open wound into thorax, with penetration of heart chambers | Finding site | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier | 3 | 
| Lung laceration with open wound into thorax | Finding site | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier | 2 | 
| Multiple intrathoracic organ injury with open wound into cavity | Finding site | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier | 1 | 
| Internal injury of chest, abdomen and pelvis | Finding site | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier | 2 | 
| Internal injury of chest, abdomen or pelvis NOS | Finding site | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier | 2 | 
| Pneumohemothorax due to trauma | Finding site | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier | 1 | 
| Traumatic hemothorax without open wound into thorax | Finding site | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier | 1 | 
| Traumatic pneumohemothorax without open wound into thorax | Finding site | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier | 1 | 
| Internal injury of chest | Finding site | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier | 1 | 
| Traumatic hemothorax with open wound into thorax | Finding site | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier | 3 | 
| Hemothorax due to trauma | Finding site | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier | 2 | 
| Traumatic pneumothorax and hemothorax NOS | Finding site | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier | 1 | 
| Entire thoracic cavity | Is a | True | Thoracic cavity structure | Inferred relationship | Existential restriction modifier |  | 
| Structure of half of thoracic cavity lateral to midsagittal plane | Is a | True | Thoracic cavity structure | Inferred relationship | Existential restriction modifier |  | 
| Exploratory median sternotomy | Procedure site - Direct | True | Thoracic cavity structure | Inferred relationship | Existential restriction modifier | 2 | 
| Minithoracotomy | Procedure site - Direct | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier | 1 | 
| Computed tomography of intrathoracic structures | Procedure site - Direct | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier | 1 | 
| Exploratory thoracotomy | Procedure site - Direct | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier | 1 | 
| Ventriculopleural shunt with valve | Procedure site - Direct | True | Thoracic cavity structure | Inferred relationship | Existential restriction modifier | 4 | 
| Cerebral ventricular to thoracic cavity shunt | Procedure site - Direct | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier | 2 | 
| Chest wall, pleura and diaphragm operations | Procedure site - Direct | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier |  | 
| Exploratory thoracotomy NEC | Procedure site - Direct | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier | 2 | 
| Other specified operations on chest wall, pleura or diaphragm | Procedure site - Direct | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier |  | 
| Chest wall, pleura and diaphragm operations NOS | Procedure site - Direct | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier |  | 
| Neoplasm of intrathoracic organs | Finding site | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier | 1 | 
| Malignant neoplasm of other site of respiratory tract | Finding site | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier | 1 | 
| Malignant tumor of respiratory and intrathoracic organ | Finding site | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier | 1 | 
| [X]Malignant neoplasm of respiratory and intrathoracic organs | Finding site | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier | 1 | 
| Overlapping malignant neoplasm of respiratory and intrathoracic organs | Finding site | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier | 1 | 
| Malignant neoplasm of other and ill-defined sites within the respiratory and intrathoracic organs | Finding site | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier | 1 | 
| Malignant neoplasm of upper respiratory tract, part unspecified | Finding site | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier | 1 | 
| Malignant neoplasm of respiratory tract NOS | Finding site | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier | 1 | 
| [X]Malignant neoplasm of ill-defined sites within the respiratory system | Finding site | False | Thoracic cavity structure | Inferred relationship | Existential restriction modifier | 1 |