| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group | 
| Primary carcinoma of vermilion border of upper lip | Is a | True | Primary carcinoma of lip | Inferred relationship | Some | |
| Primary carcinoma of vermilion border of lower lip | Is a | True | Primary carcinoma of lip | Inferred relationship | Some | |
| Primary carcinoma of fraenum of lip | Is a | True | Primary carcinoma of lip | Inferred relationship | Some | |
| Primary carcinoma of commissure of lip | Is a | True | Primary carcinoma of lip | Inferred relationship | Some | 
Reference Sets
Clinical finding foundation reference set
Australian dialect reference set
Neoplasm and/or hamartoma reference set
Problem/Diagnosis reference set