| Outbound Relationships | Type | Target | Active | Characteristic | Refinability | Group | Values | 
| Metastasis to mediastinum of unknown primary | Is a | Metastatic malignant neoplasm to mediastinum | true | Inferred relationship | Existential restriction modifier |  |  | 
| Metastasis to mediastinum of unknown primary | Finding site | Structure of respiratory system | false | Inferred relationship | Existential restriction modifier | 1 |  | 
| Metastasis to mediastinum of unknown primary | Pathological process | Secondary malignant neoplastic process | false | Inferred relationship | Existential restriction modifier |  |  | 
| Metastasis to mediastinum of unknown primary | Associated morphology | Malignant neoplasm of primary, secondary, or uncertain origin | false | Inferred relationship | Existential restriction modifier | 2 |  | 
| Metastasis to mediastinum of unknown primary | Finding site | Intrathoracic organ | false | Inferred relationship | Existential restriction modifier | 1 |  | 
| Metastasis to mediastinum of unknown primary | Finding site | Mediastinal structure | false | Inferred relationship | Existential restriction modifier | 1 |  | 
| Metastasis to mediastinum of unknown primary | Associated morphology | Neoplasm, metastatic | false | Inferred relationship | Existential restriction modifier | 1 |  | 
| Metastasis to mediastinum of unknown primary | Associated morphology | Malignant neoplasm, primary | false | Inferred relationship | Existential restriction modifier |  |  | 
| Metastasis to mediastinum of unknown primary | Pathological process | Malignant neoplastic process | false | Inferred relationship | Existential restriction modifier |  |  | 
| Metastasis to mediastinum of unknown primary | Associated morphology | Neoplasm, metastatic | false | Inferred relationship | Existential restriction modifier | 2 |  | 
| Metastasis to mediastinum of unknown primary | Associated morphology | Neoplasm, metastatic | false | Inferred relationship | Existential restriction modifier | 2 |  | 
| Metastasis to mediastinum of unknown primary | Associated morphology | Neoplasm, metastatic | false | Inferred relationship | Existential restriction modifier | 2 |  | 
| Metastasis to mediastinum of unknown primary | Associated morphology | Neoplasm, metastatic | false | Inferred relationship | Existential restriction modifier | 1 |  | 
| Metastasis to mediastinum of unknown primary | Associated morphology | Neoplasm, metastatic | true | Inferred relationship | Existential restriction modifier | 1 |  | 
| Metastasis to mediastinum of unknown primary | Finding site | Mediastinal structure | true | Inferred relationship | Existential restriction modifier | 1 |  | 
| Metastasis to mediastinum of unknown primary | Associated morphology | Neoplasm, metastatic | false | Inferred relationship | Existential restriction modifier | 2 |  | 
| Metastasis to mediastinum of unknown primary | Finding site | Structure of respiratory system and/or intrathoracic structure | false | Inferred relationship | Existential restriction modifier | 2 |  |