| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group | 
| Squamous cell carcinoma of skin of upper lip | Is a | False | Primary malignant neoplasm of skin of lip | Inferred relationship | Existential restriction modifier | |
| Squamous cell carcinoma of skin of lower lip | Is a | False | Primary malignant neoplasm of skin of lip | Inferred relationship | Existential restriction modifier | |
| Primary malignant neoplasm of commissure of lip | Is a | False | Primary malignant neoplasm of skin of lip | Inferred relationship | Existential restriction modifier | |
| Squamous cell carcinoma of lip | Is a | False | Primary malignant neoplasm of skin of lip | Inferred relationship | Existential restriction modifier | |
| Primary angiosarcoma of skin of lip | Is a | True | Primary malignant neoplasm of skin of lip | Inferred relationship | Existential restriction modifier | |
| Primary squamous cell carcinoma of skin of lip | Is a | True | Primary malignant neoplasm of skin of lip | Inferred relationship | Existential restriction modifier | 
This concept is not in any reference sets