| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group | 
| Hemangioendothelioma, malignant | Is a | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier |  | 
| Hemangiosarcoma | Is a | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier |  | 
| Kaposi's sarcoma, morphology | Is a | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier |  | 
| Epithelioid hemangioendothelioma, malignant | Is a | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier |  | 
| Kupffer cell sarcoma | Is a | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier |  | 
| Hemangiopericytoma, malignant | Is a | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier |  | 
| Primary malignant neoplasm of blood vessel of abdomen | Associated morphology | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary malignant neoplasm of blood vessel of axilla | Associated morphology | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary malignant neoplasm of blood vessel of buttock | Associated morphology | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary malignant neoplasm of blood vessel of face | Associated morphology | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary malignant neoplasm of blood vessel of finger | Associated morphology | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary malignant neoplasm of blood vessel of foot | Associated morphology | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary malignant neoplasm of blood vessel of forearm | Associated morphology | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary malignant neoplasm of blood vessel of hand | Associated morphology | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary malignant neoplasm of blood vessel of head | Associated morphology | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary malignant neoplasm of blood vessel of hip | Associated morphology | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary malignant neoplasm of blood vessel of inguinal region | Associated morphology | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary malignant neoplasm of blood vessel of lower limb | Associated morphology | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary malignant neoplasm of blood vessel of neck | Associated morphology | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary malignant neoplasm of blood vessel of pelvis | Associated morphology | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary malignant neoplasm of blood vessel of perineum | Associated morphology | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary malignant neoplasm of blood vessel of popliteal space | Associated morphology | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary malignant neoplasm of blood vessel of shoulder | Associated morphology | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary malignant neoplasm of blood vessel of thigh | Associated morphology | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary malignant neoplasm of blood vessel of thorax | Associated morphology | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary malignant neoplasm of blood vessel of toe | Associated morphology | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary malignant neoplasm of blood vessel of trunk | Associated morphology | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary malignant neoplasm of blood vessel of upper limb | Associated morphology | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary malignant neoplasm of blood vessel | Associated morphology | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary malignant neoplasm of great vessels | Associated morphology | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary malignant neoplasm of blood vessel of upper arm | Associated morphology | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary malignant neoplasm of blood vessel of lower leg | Associated morphology | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary malignant neoplasm of blood vessel of toe | Associated morphology | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary malignant neoplasm of blood vessel of pelvis | Associated morphology | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary malignant neoplasm of blood vessel of inguinal region | Associated morphology | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary malignant neoplasm of blood vessel of hip | Associated morphology | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary malignant neoplasm of blood vessel of perineum | Associated morphology | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary malignant neoplasm of blood vessel of thorax | Associated morphology | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary malignant neoplasm of blood vessel of abdomen | Associated morphology | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary malignant neoplasm of blood vessel of forearm | Associated morphology | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary malignant neoplasm of blood vessel of shoulder | Associated morphology | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary malignant neoplasm of blood vessel of axilla | Associated morphology | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary malignant neoplasm of blood vessel of face | Associated morphology | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary malignant neoplasm of blood vessel of upper arm | Associated morphology | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary malignant neoplasm of blood vessel of thigh | Associated morphology | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary malignant neoplasm of blood vessel of buttock | Associated morphology | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary malignant neoplasm of blood vessel of popliteal space | Associated morphology | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary malignant neoplasm of blood vessel of lower leg | Associated morphology | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary malignant neoplasm of blood vessel of hand | Associated morphology | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary malignant neoplasm of blood vessel of finger | Associated morphology | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary malignant neoplasm of blood vessel of trunk | Associated morphology | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary malignant neoplasm of blood vessel of upper limb | Associated morphology | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary malignant neoplasm of blood vessel of head | Associated morphology | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary malignant neoplasm of blood vessel of lower limb | Associated morphology | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary malignant neoplasm of blood vessel of neck | Associated morphology | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary malignant neoplasm of great vessels | Associated morphology | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary malignant neoplasm of blood vessel of foot | Associated morphology | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier | 1 | 
| Primary malignant neoplasm of blood vessel of toe | Associated morphology | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier | 2 | 
| Primary malignant neoplasm of blood vessel of foot | Associated morphology | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier | 2 | 
| Primary malignant neoplasm of blood vessel of perineum | Associated morphology | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier | 2 | 
| Primary malignant neoplasm of blood vessel of inguinal region | Associated morphology | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier | 2 | 
| Primary malignant neoplasm of blood vessel of neck | Associated morphology | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier | 2 | 
| Primary malignant neoplasm of blood vessel of shoulder | Associated morphology | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier | 2 | 
| Primary malignant neoplasm of blood vessel of pelvis | Associated morphology | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier | 2 | 
| Primary malignant neoplasm of blood vessel of perineum | Associated morphology | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier | 3 | 
| Primary malignant neoplasm of blood vessel of inguinal region | Associated morphology | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier | 3 | 
| Primary malignant neoplasm of blood vessel of head | Associated morphology | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier | 2 | 
| Primary malignant neoplasm of blood vessel of foot | Associated morphology | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier | 3 | 
| Primary malignant neoplasm of blood vessel of thigh | Associated morphology | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier | 2 | 
| Primary malignant neoplasm of blood vessel of forearm | Associated morphology | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier | 2 | 
| Primary malignant neoplasm of blood vessel of lower limb | Associated morphology | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier | 2 | 
| Primary malignant neoplasm of blood vessel of toe | Associated morphology | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier | 3 | 
| Primary malignant neoplasm of blood vessel of lower leg | Associated morphology | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier | 2 | 
| Primary malignant neoplasm of blood vessel of hand | Associated morphology | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier | 2 | 
| Primary malignant neoplasm of blood vessel of thorax | Associated morphology | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier | 2 | 
| Primary malignant neoplasm of blood vessel of finger | Associated morphology | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier | 2 | 
| Primary malignant neoplasm of blood vessel of hip | Associated morphology | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier | 2 | 
| Primary malignant neoplasm of blood vessel of upper arm | Associated morphology | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier | 2 | 
| Primary malignant neoplasm of blood vessel of popliteal space | Associated morphology | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier | 2 | 
| Primary malignant neoplasm of blood vessel of upper limb | Associated morphology | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier | 2 | 
| Primary malignant neoplasm of blood vessel of trunk | Associated morphology | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier | 2 | 
| Intimal sarcoma | Is a | False | Malignant blood vessel neoplasm, primary | Inferred relationship | Existential restriction modifier |  |