| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group | 
| Superficial partial thickness burn of lip(s) | Finding site | False | Oral mucous membrane structure | Inferred relationship | Some |  | 
| Carcinoma of lip | Finding site | False | Oral mucous membrane structure | Inferred relationship | Some |  | 
| Malignant neoplasm of labial frenulum | Finding site | False | Oral mucous membrane structure | Inferred relationship | Some |  | 
| Malignant neoplasm of lip unspecified, inner aspect | Finding site | False | Oral mucous membrane structure | Inferred relationship | Some |  | 
| Malignant neoplasm of lip unspecified, frenulum | Finding site | False | Oral mucous membrane structure | Inferred relationship | Some |  | 
| Malignant neoplasm of other sites of lip | Finding site | False | Oral mucous membrane structure | Inferred relationship | Some |  | 
| Malignant neoplasm of vermilion border of lip unspecified | Finding site | False | Oral mucous membrane structure | Inferred relationship | Some |  | 
| Malignant neoplasm of lip, unspecified, external | Finding site | False | Oral mucous membrane structure | Inferred relationship | Some |  | 
| Malignant neoplasm of lip, unspecified, lipstick area | Finding site | False | Oral mucous membrane structure | Inferred relationship | Some |  | 
| Malignant neoplasm of lip, vermilion border NOS | Finding site | False | Oral mucous membrane structure | Inferred relationship | Some |  | 
| Benign neoplasm of lip NOS | Finding site | False | Oral mucous membrane structure | Inferred relationship | Some | 1 | 
| Secondary syphilis of mouth | Finding site | True | Oral mucous membrane structure | Inferred relationship | Some | 1 | 
| Oral syphilis | Finding site | True | Oral mucous membrane structure | Inferred relationship | Some | 1 | 
| Oral aphthae NOS | Finding site | False | Oral mucous membrane structure | Inferred relationship | Some | 1 | 
| Diseases of lips NOS | Finding site | False | Oral mucous membrane structure | Inferred relationship | Some |  | 
| Cleft lip, unspecified | Finding site | False | Oral mucous membrane structure | Inferred relationship | Some | 1 | 
| Cleft lip NOS | Finding site | False | Oral mucous membrane structure | Inferred relationship | Some | 1 | 
| Cleft palate with cleft lip, unspecified | Finding site | False | Oral mucous membrane structure | Inferred relationship | Some | 1 | 
| Cleft palate with cleft lip NOS | Finding site | False | Oral mucous membrane structure | Inferred relationship | Some | 4 | 
| Cleft palate or cleft lip NOS | Finding site | False | Oral mucous membrane structure | Inferred relationship | Some | 2 | 
| Other anomalies of lip | Finding site | False | Oral mucous membrane structure | Inferred relationship | Some |  | 
| Other anomaly of lip NOS | Finding site | False | Oral mucous membrane structure | Inferred relationship | Some |  | 
| [X]Unspecified cleft palate with cleft lip, bilateral | Finding site | False | Oral mucous membrane structure | Inferred relationship | Some | 2 | 
| Unspecified thickness burn of lip(s) | Finding site | False | Oral mucous membrane structure | Inferred relationship | Some |  | 
| Other congenital anomaly of palate | Finding site | False | Oral mucous membrane structure | Inferred relationship | Some | 2 | 
| Malignant neoplasm of lip, unspecified | Finding site | False | Oral mucous membrane structure | Inferred relationship | Some |  | 
| Colour of oral mucosa - finding | Finding site | False | Oral mucous membrane structure | Inferred relationship | Some | 2 | 
| Moistness of oral mucosa - finding | Finding site | False | Oral mucous membrane structure | Inferred relationship | Some | 2 | 
| Acute necrotising ulcerative gingivostomatitis | Finding site | True | Oral mucous membrane structure | Inferred relationship | Some | 3 | 
| Inflammatory fibrous hyperplasia of mouth | Finding site | False | Oral mucous membrane structure | Inferred relationship | Some | 2 | 
| Leaf-shaped fibroma of oral mucosa | Finding site | True | Oral mucous membrane structure | Inferred relationship | Some | 2 | 
| Recurrent ulcer of mouth | Finding site | True | Oral mucous membrane structure | Inferred relationship | Some | 1 | 
| Verrucous carcinoma of oral cavity | Finding site | True | Oral mucous membrane structure | Inferred relationship | Some | 1 | 
| Oral frictional keratosis | Finding site | True | Oral mucous membrane structure | Inferred relationship | Some | 1 | 
| Wandering rash of mouth | Finding site | False | Oral mucous membrane structure | Inferred relationship | Some | 1 | 
| Nonspecific irritant contact stomatitis | Finding site | True | Oral mucous membrane structure | Inferred relationship | Some | 1 | 
| Smokeless tobacco keratosis | Finding site | True | Oral mucous membrane structure | Inferred relationship | Some | 1 | 
| Oral papillomatosis | Finding site | True | Oral mucous membrane structure | Inferred relationship | Some | 1 | 
| Oral ulcerative mucositis due to antineoplastic therapy | Finding site | False | Oral mucous membrane structure | Inferred relationship | Some | 1 | 
| Oral melanocytic macule | Finding site | True | Oral mucous membrane structure | Inferred relationship | Some | 3 | 
| Melanotic macule of oral mucosa (reactive type) | Finding site | True | Oral mucous membrane structure | Inferred relationship | Some | 3 | 
| Lichenoid allergic contact reaction affecting oral mucosa | Finding site | False | Oral mucous membrane structure | Inferred relationship | Some | 3 | 
| Traumatic blister of mouth | Finding site | True | Oral mucous membrane structure | Inferred relationship | Some | 2 | 
| Oral involvement by mucous membrane pemphigoid | Finding site | True | Oral mucous membrane structure | Inferred relationship | Some | 1 | 
| Oral mucous membrane involvement by bullous pemphigoid | Finding site | True | Oral mucous membrane structure | Inferred relationship | Some | 1 | 
| Infected abrasion of oral mucosa | Finding site | True | Oral mucous membrane structure | Inferred relationship | Some | 1 | 
| O/E - mouth - Koplik's spots | Finding site | False | Oral mucous membrane structure | Inferred relationship | Some | 3 | 
| Noma neonatorum | Finding site | True | Oral mucous membrane structure | Inferred relationship | Some | 1 | 
| Oral leukoplakia caused by sanguinarine | Finding site | True | Oral mucous membrane structure | Inferred relationship | Some | 1 | 
| Vesicular stomatitis virus disease | Finding site | True | Oral mucous membrane structure | Inferred relationship | Some | 1 | 
| Oral lichen sclerosus | Finding site | True | Oral mucous membrane structure | Inferred relationship | Some | 1 | 
| Inflammatory fibroepithelial hyperplasia of oral mucous membrane caused by denture | Finding site | True | Oral mucous membrane structure | Inferred relationship | Some | 1 | 
| Inflammatory fibroepithelial hyperplasia of oral mucous membrane | Finding site | True | Oral mucous membrane structure | Inferred relationship | Some | 1 | 
| Inflammatory fibroepithelial hyperplasia of oral mucous membrane caused by denture | Finding site | True | Oral mucous membrane structure | Inferred relationship | Some | 2 | 
| Inflammatory fibroepithelial hyperplasia of oral mucous membrane | Finding site | True | Oral mucous membrane structure | Inferred relationship | Some | 2 | 
| Fibroepithelial polyp of oral mucous membrane | Finding site | True | Oral mucous membrane structure | Inferred relationship | Some | 1 | 
| Mucous membrane eruption of oral mucous membrane | Finding site | True | Oral mucous membrane structure | Inferred relationship | Some | 1 | 
| Irritant contact stomatitis caused by denture | Finding site | True | Oral mucous membrane structure | Inferred relationship | Some | 1 | 
| Allergic contact stomatitis caused by denture | Finding site | True | Oral mucous membrane structure | Inferred relationship | Some | 1 | 
| Oral mucous membrane inflammation due to denture trauma | Finding site | True | Oral mucous membrane structure | Inferred relationship | Some | 1 | 
| Oral mucous membrane inflammation due to denture trauma | Finding site | True | Oral mucous membrane structure | Inferred relationship | Some | 3 | 
| Intact oral mucosa | Finding site | True | Oral mucous membrane structure | Inferred relationship | Some | 1 | 
| Histologic type of primary malignant neoplasm of oral mucosa | Inherent location | True | Oral mucous membrane structure | Inferred relationship | Some | 5 | 
| Cleaning of oral mucous membrane | Procedure site | True | Oral mucous membrane structure | Inferred relationship | Some | 2 | 
| Histologic grade of primary malignant neoplasm of oral mucosa | Inherent location | True | Oral mucous membrane structure | Inferred relationship | Some | 5 | 
| Presence of direct invasion by primary malignant neoplasm of oral mucosa to nerve | Inherent location | True | Oral mucous membrane structure | Inferred relationship | Some | 7 | 
| Anatomic location directly invaded by primary malignant neoplasm of oral mucosa | Inherent location | True | Oral mucous membrane structure | Inferred relationship | Some | 6 | 
| Presence of direct invasion by primary malignant neoplasm of oral mucosa to lymphatic vessel and/or small blood vessel | Inherent location | True | Oral mucous membrane structure | Inferred relationship | Some | 7 | 
| Midfacial degloving operation | Procedure site - Direct | True | Oral mucous membrane structure | Inferred relationship | Some | 947133387 | 
| Transoral mucosectomy | Procedure site - Direct | True | Oral mucous membrane structure | Inferred relationship | Some | 262237076 | 
| Robot assisted transoral mucosectomy | Procedure site - Direct | True | Oral mucous membrane structure | Inferred relationship | Some | 1609137397 | 
| Ulcerative inflammation of oral mucous membrane due to and following administration of antineoplastic agent | Finding site | True | Oral mucous membrane structure | Inferred relationship | Some | 1 | 
| Pigmentary disturbance of oral mucosa | Finding site | True | Oral mucous membrane structure | Inferred relationship | Some | 1 | 
| Recurrent aphthous stomatitis | Finding site | True | Oral mucous membrane structure | Inferred relationship | Some | 3 | 
| Impaired oral mucous membrane | Finding site | True | Oral mucous membrane structure | Inferred relationship | Some | 2 | 
| Mouth blister with infection | Finding site | True | Oral mucous membrane structure | Inferred relationship | Some | 1 | 
| Mouth and genital ulcers with inflamed cartilage syndrome | Finding site | True | Oral mucous membrane structure | Inferred relationship | Some | 8 | 
| Metastatic verrucous carcinoma to oral cavity | Finding site | True | Oral mucous membrane structure | Inferred relationship | Some | 1 | 
| Primary verrucous carcinoma of oral cavity | Finding site | True | Oral mucous membrane structure | Inferred relationship | Some | 1 | 
| Structure of vermilion border of lip | Is a | True | Oral mucous membrane structure | Inferred relationship | Some |  | 
| Amalgam tattoo | Finding site | False | Oral mucous membrane structure | Inferred relationship | Some | 4 | 
| Amalgam tattoo | Finding site | False | Oral mucous membrane structure | Inferred relationship | Some | 1 | 
| Benign neoplasm of external upper lip | Finding site | False | Oral mucous membrane structure | Inferred relationship | Some | 6 | 
| Buccal mucosa | Is a | True | Oral mucous membrane structure | Inferred relationship | Some |  | 
| Primary syphilis of lip | Finding site | False | Oral mucous membrane structure | Inferred relationship | Some |  | 
| Carcinoma in situ of commissure of lip | Finding site | False | Oral mucous membrane structure | Inferred relationship | Some | 2 | 
| Entire oral mucous membrane | Is a | True | Oral mucous membrane structure | Inferred relationship | Some |  | 
| Carcinoma in situ of lip, oral cavity and/or pharynx | Finding site | False | Oral mucous membrane structure | Inferred relationship | Some | 4 | 
| Carcinoma in situ of lip, oral cavity and pharynx NOS | Finding site | False | Oral mucous membrane structure | Inferred relationship | Some | 4 | 
| Melanocytic nevus of lip | Finding site | False | Oral mucous membrane structure | Inferred relationship | Some | 4 | 
| Streptococcal infection of mouth | Finding site | False | Oral mucous membrane structure | Inferred relationship | Some |  | 
| Herpangina | Finding site | False | Oral mucous membrane structure | Inferred relationship | Some | 1 | 
| Benign tumour of upper labial mucosa | Finding site | False | Oral mucous membrane structure | Inferred relationship | Some | 4 | 
| Benign tumour of labial mucosa | Finding site | False | Oral mucous membrane structure | Inferred relationship | Some | 5 | 
| Infectious disease of oral mucosa | Finding site | False | Oral mucous membrane structure | Inferred relationship | Some |  | 
| Oral mucosal viral disease | Finding site | False | Oral mucous membrane structure | Inferred relationship | Some |  | 
| Oral infection caused by herpes simplex virus | Finding site | False | Oral mucous membrane structure | Inferred relationship | Some |  | 
| Primary oral herpes simplex infection | Finding site | False | Oral mucous membrane structure | Inferred relationship | Some |  | 
| Recurrent oral herpes simplex infection | Finding site | False | Oral mucous membrane structure | Inferred relationship | Some |  | 
| Herpes zoster infection of oral mucosa | Finding site | False | Oral mucous membrane structure | Inferred relationship | Some |  | 
| Oral mucosal bacterial disease | Finding site | False | Oral mucous membrane structure | Inferred relationship | Some |  |