| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group | 
| Structure of mucosa of labial commissure | Is a | True | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier |  | 
| Entire mucous membrane of lip | Is a | True | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier |  | 
| Structure of mucous membrane of upper lip | Is a | True | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier |  | 
| Structure of mucous membrane of lower lip | Is a | True | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier |  | 
| Lip biting | Finding site | True | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier | 1 | 
| Melanocytic nevus of lip | Finding site | False | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier | 1 | 
| Simple laceration of labial mucosa | Finding site | False | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier | 1 | 
| Contaminated simple laceration of labial mucosa | Finding site | False | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier | 1 | 
| Complex laceration of labial mucosa | Finding site | False | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier | 1 | 
| Contaminated complex laceration of labial mucosa | Finding site | False | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier | 1 | 
| Avulsion of labial mucosa | Finding site | False | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier | 1 | 
| Burn of labial mucosa | Finding site | False | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier | 1 | 
| Burn erythema of labial mucosa | Finding site | False | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier | 1 | 
| Second degree burn of labial mucosa | Finding site | False | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier | 1 | 
| Third degree burn of labial mucosa | Finding site | False | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier | 1 | 
| Tumor of labial mucosa | Finding site | False | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier | 1 | 
| Laceration of intraoral surface of lip | Finding site | False | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier | 1 | 
| Abrasion of intraoral surface of lip | Finding site | False | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier | 1 | 
| Contusion of intraoral surface of lip | Finding site | False | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier | 1 | 
| Bruise of intraoral surface of lip | Finding site | False | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier | 1 | 
| Hematoma of intraoral surface of lip | Finding site | False | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier | 1 | 
| Penetrating injury of intraoral surface of lip | Finding site | False | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier | 1 | 
| Ecchymosis of intraoral surface of lip | Finding site | True | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier | 1 | 
| Neoplasm of inner aspect of lip | Finding site | False | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier | 1 | 
| Benign neoplasm of inner aspect of lip | Finding site | False | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier | 1 | 
| Carcinoma in situ of inner aspect of lip | Finding site | False | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier | 1 | 
| Primary malignant neoplasm of inner aspect of lip | Finding site | False | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier | 1 | 
| Metastatic malignant neoplasm to inner aspect of lip | Finding site | False | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier | 1 | 
| Neoplasm of uncertain behavior of inner aspect of lip | Finding site | False | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier | 1 | 
| Malignant tumor of labial mucosa | Finding site | False | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier | 1 | 
| Benign tumor of labial mucosa | Finding site | False | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier | 1 | 
| Carcinoma in situ of frenum of lip | Finding site | False | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier | 2 | 
| Benign neoplasm of frenum of lip | Finding site | False | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier | 1 | 
| Carcinoma in situ of labial mucosa | Finding site | False | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier |  | 
| Malignant neoplasm of lip unspecified, mucosa | Finding site | False | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier | 1 | 
| Malignant neoplasm of lip, inner aspect NOS | Finding site | False | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier | 1 | 
| Malignant tumor of upper labial mucosa | Finding site | False | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier | 1 | 
| Malignant neoplasm of upper lip, buccal aspect | Finding site | False | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier | 1 | 
| Malignant tumor of frenum of upper lip | Finding site | False | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier | 1 | 
| Malignant neoplasm of lower lip, buccal aspect | Finding site | False | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier | 1 | 
| Malignant tumor of frenum of lower lip | Finding site | False | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier | 1 | 
| Malignant neoplasm of lower lip, mucosa | Finding site | False | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier | 1 | 
| Carcinoma of frenum of upper lip | Finding site | False | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier | 1 | 
| Carcinoma of frenum of lower lip | Finding site | False | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier | 1 | 
| Malignant tumor of lower labial mucosa | Finding site | False | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier | 1 | 
| Malignant neoplasm of upper lip, inner aspect NOS | Finding site | False | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier | 1 | 
| Malignant neoplasm of lower lip, inner aspect NOS | Finding site | False | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier | 1 | 
| Benign neoplasm of inner aspect of lower lip | Finding site | False | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier | 3 | 
| Benign neoplasm of inner aspect of upper lip | Finding site | False | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier | 3 | 
| Benign neoplasm of inner aspect of lip | Finding site | False | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier | 3 | 
| Advancement of mucosa of lip | Procedure site - Direct | False | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier | 1 | 
| Advancement of mucosa of lip NEC | Procedure site - Direct | False | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier | 1 | 
| Leukoplakia of lips | Finding site | False | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier | 1 | 
| Laceration of intraoral surface of lip | Finding site | True | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier | 1 | 
| Contusion of intraoral surface of lip | Finding site | True | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier | 1 | 
| Abrasion of intraoral surface of lip | Finding site | True | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier | 1 | 
| Burn erythema of labial mucosa | Finding site | True | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier | 1 | 
| Burn of labial mucosa | Finding site | True | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier | 1 | 
| Avulsion of labial mucosa | Finding site | True | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier | 1 | 
| Penetrating injury of intraoral surface of lip | Finding site | True | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier | 1 | 
| Advancement of mucosa of lip | Procedure site - Direct | True | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier | 1 | 
| Hematoma of intraoral surface of lip | Finding site | True | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier | 1 | 
| Metastatic malignant neoplasm to inner aspect of lip | Finding site | True | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier | 1 | 
| Contaminated simple laceration of labial mucosa | Finding site | True | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier | 1 | 
| Benign tumor of labial mucosa | Finding site | True | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier | 1 | 
| Carcinoma in situ of inner aspect of lip | Finding site | True | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier | 1 | 
| Malignant tumor of labial mucosa | Finding site | True | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier | 1 | 
| Contaminated complex laceration of labial mucosa | Finding site | True | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier | 1 | 
| Complex laceration of labial mucosa | Finding site | True | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier | 1 | 
| Neoplasm of uncertain behavior of inner aspect of lip | Finding site | True | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier | 1 | 
| Malignant neoplasm of lip, inner aspect NOS | Finding site | False | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier | 1 | 
| Neoplasm of inner aspect of lip | Finding site | True | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier | 1 | 
| Leukoplakia of lips | Finding site | True | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier | 1 | 
| Primary malignant neoplasm of inner aspect of lip | Finding site | True | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier | 1 | 
| Tumor of labial mucosa | Finding site | False | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier | 1 | 
| Malignant neoplasm of lip unspecified, mucosa | Finding site | False | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier | 1 | 
| Simple laceration of labial mucosa | Finding site | True | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier | 1 | 
| Advancement of mucosa of lip NEC | Procedure site - Direct | False | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier | 1 | 
| Second degree burn of labial mucosa | Finding site | True | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier | 1 | 
| Third degree burn of labial mucosa | Finding site | True | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier | 1 | 
| Primary squamous cell carcinoma of mucous membrane of lip | Finding site | True | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier | 1 | 
| Malignant neoplasm of lip, inner aspect NOS | Finding site | False | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier | 1 | 
| Advancement of mucosa of lip NEC | Procedure site - Direct | False | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier | 1 | 
| Malignant neoplasm of lip unspecified, mucosa | Finding site | False | Structure of mucous membrane of lip | Inferred relationship | Existential restriction modifier | 1 |