| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group |
| Benign tumor of frenum of lower lip | Is a | False | Benign tumor of lower labial mucosa | Inferred relationship | Existential restriction modifier | |
| Benign tumor of frenum of lower lip | Is a | True | Benign tumor of lower labial mucosa | Inferred relationship | Existential restriction modifier |
This concept is not in any reference sets