| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group | 
| Entire choana (body structure) | Is a | True | Structure of choana (body structure) | Inferred relationship | Some |  | 
| Choanal atresia | Finding site | True | Structure of choana (body structure) | Inferred relationship | Some | 1 | 
| Atresia of the posterior nares | Finding site | False | Structure of choana (body structure) | Inferred relationship | Some | 1 | 
| Choanal atresia with radial ray hypoplasia | Finding site | False | Structure of choana (body structure) | Inferred relationship | Some | 2 | 
| Choanal atresia with coloboma, heart malformation, choanal atresia, retardation of growth and development, genital abnormalities, and ear malformations association | Finding site | False | Structure of choana (body structure) | Inferred relationship | Some | 2 | 
| Choanogram | Procedure site | False | Structure of choana (body structure) | Inferred relationship | Some | 1 | 
| Bleeding point in nose | Finding site | False | Structure of choana (body structure) | Inferred relationship | Some |  | 
| Choanal stenosis | Finding site | False | Structure of choana (body structure) | Inferred relationship | Some | 1 | 
| Finding of posterior choanae | Finding site | True | Structure of choana (body structure) | Inferred relationship | Some | 1 | 
| Choanae patent | Finding site | True | Structure of choana (body structure) | Inferred relationship | Some | 1 | 
| Choanae non-patent | Finding site | True | Structure of choana (body structure) | Inferred relationship | Some | 1 | 
| Repair of choanal atresia by intranasal approach | Procedure site | False | Structure of choana (body structure) | Inferred relationship | Some | 1 | 
| Lysis of adhesions of choanae of nasopharynx | Procedure site | False | Structure of choana (body structure) | Inferred relationship | Some | 1 | 
| Choanal polyp | Finding site | True | Structure of choana (body structure) | Inferred relationship | Some | 1 | 
| Congenital stenosis of choanae | Finding site | False | Structure of choana (body structure) | Inferred relationship | Some | 1 | 
| Repair of choanal atresia by transpalatal approach (procedure) | Procedure site | False | Structure of choana (body structure) | Inferred relationship | Some | 1 | 
| Malignant tumor of anterior wall of nasopharynx | Finding site | False | Structure of choana (body structure) | Inferred relationship | Some |  | 
| Tumor of anterior wall of nasopharynx | Finding site | False | Structure of choana (body structure) | Inferred relationship | Some |  | 
| Benign tumor of anterior wall of nasopharynx | Finding site | False | Structure of choana (body structure) | Inferred relationship | Some |  | 
| Malignant neoplasm of anterior wall of nasopharynx NOS | Finding site | False | Structure of choana (body structure) | Inferred relationship | Some |  | 
| Choanal atresia, unspecified | Finding site | False | Structure of choana (body structure) | Inferred relationship | Some | 1 | 
| Choanal atresia NOS | Finding site | False | Structure of choana (body structure) | Inferred relationship | Some | 1 | 
| Lysis of adhesions of choanae of nasopharynx | Procedure site | False | Structure of choana (body structure) | Inferred relationship | Some | 1 | 
| Lysis of adhesions of choanae of nasopharynx | Procedure site | False | Structure of choana (body structure) | Inferred relationship | Some | 2 | 
| Lysis of adhesions of choanae of nasopharynx | Procedure site | False | Structure of choana (body structure) | Inferred relationship | Some | 1 | 
| Lysis of adhesions of choanae of nasopharynx | Procedure site | False | Structure of choana (body structure) | Inferred relationship | Some | 2 | 
| Lysis of adhesions of choanae of nasopharynx | Procedure site | False | Structure of choana (body structure) | Inferred relationship | Some | 1 | 
| Lysis of adhesions of choanae of nasopharynx | Procedure site | False | Structure of choana (body structure) | Inferred relationship | Some | 2 | 
| Lysis of adhesions of choanae of nasopharynx | Procedure site | False | Structure of choana (body structure) | Inferred relationship | Some | 2 | 
| Lysis of adhesions of choanae of nasopharynx | Procedure site | False | Structure of choana (body structure) | Inferred relationship | Some | 1 | 
| Lysis of adhesions of choanae of nasopharynx | Procedure site | False | Structure of choana (body structure) | Inferred relationship | Some | 1 | 
| Lysis of adhesions of choanae of nasopharynx | Procedure site | False | Structure of choana (body structure) | Inferred relationship | Some | 2 | 
| Lysis of adhesions of choanae of nasopharynx | Procedure site | False | Structure of choana (body structure) | Inferred relationship | Some | 1 | 
| Lysis of adhesions of choanae of nasopharynx | Procedure site | False | Structure of choana (body structure) | Inferred relationship | Some | 2 | 
| Choanogram | Procedure site - Direct (attribute) | False | Structure of choana (body structure) | Inferred relationship | Some | 1 | 
| Repair of choanal atresia by intranasal approach | Procedure site - Direct (attribute) | True | Structure of choana (body structure) | Inferred relationship | Some | 1 | 
| Lysis of adhesions of choanae of nasopharynx | Procedure site - Indirect (attribute) | False | Structure of choana (body structure) | Inferred relationship | Some | 1 | 
| Repair of choanal atresia by transpalatal approach (procedure) | Procedure site - Direct (attribute) | True | Structure of choana (body structure) | Inferred relationship | Some | 1 | 
| Congenital stenosis of choanae | Finding site | False | Structure of choana (body structure) | Inferred relationship | Some | 1 | 
| Choanal atresia with coloboma, heart malformation, choanal atresia, retardation of growth and development, genital abnormalities, and ear malformations association | Finding site | False | Structure of choana (body structure) | Inferred relationship | Some | 2 | 
| Choanal atresia with radial ray hypoplasia | Finding site | False | Structure of choana (body structure) | Inferred relationship | Some | 2 | 
| Choanal atresia NOS | Finding site | False | Structure of choana (body structure) | Inferred relationship | Some | 1 | 
| Choanogram | Procedure site - Direct (attribute) | False | Structure of choana (body structure) | Inferred relationship | Some | 1 | 
| Choanal atresia, unspecified | Finding site | False | Structure of choana (body structure) | Inferred relationship | Some | 1 | 
| Lysis of adhesions of choanae of nasopharynx | Procedure site - Indirect (attribute) | True | Structure of choana (body structure) | Inferred relationship | Some | 1 | 
| Choanal polyp | Finding site | False | Structure of choana (body structure) | Inferred relationship | Some | 1 | 
| Choanal stenosis | Finding site | True | Structure of choana (body structure) | Inferred relationship | Some | 1 | 
| Atresia of the posterior nares | Finding site | False | Structure of choana (body structure) | Inferred relationship | Some | 1 | 
| Choanal atresia | Finding site | False | Structure of choana (body structure) | Inferred relationship | Some | 1 | 
| Congenital stenosis of choanae | Finding site | False | Structure of choana (body structure) | Inferred relationship | Some | 2 | 
| Choanal atresia with coloboma, heart malformation, choanal atresia, retardation of growth and development, genital abnormalities, and ear malformations association | Finding site | False | Structure of choana (body structure) | Inferred relationship | Some | 4 | 
| Choanal atresia with radial ray hypoplasia | Finding site | False | Structure of choana (body structure) | Inferred relationship | Some | 4 | 
| Atresia of the posterior nares | Finding site | False | Structure of choana (body structure) | Inferred relationship | Some | 2 | 
| Choanal atresia | Finding site | False | Structure of choana (body structure) | Inferred relationship | Some | 2 | 
| Congenital stenosis of choanae | Finding site | True | Structure of choana (body structure) | Inferred relationship | Some | 1 | 
| Intractable diarrhea with choanal atresia and eye anomaly syndrome (disorder) | Finding site | False | Structure of choana (body structure) | Inferred relationship | Some | 7 | 
| Arrhinia with choanal atresia and microphthalmia syndrome (disorder) | Finding site | False | Structure of choana (body structure) | Inferred relationship | Some | 4 | 
| Choanal atresia, hearing loss, cardiac defect, craniofacial dysmorphism syndrome (disorder) | Finding site | False | Structure of choana (body structure) | Inferred relationship | Some | 4 | 
| Choanal atresia with radial ray hypoplasia | Finding site | True | Structure of choana (body structure) | Inferred relationship | Some | 1 | 
| Intractable diarrhea with choanal atresia and eye anomaly syndrome (disorder) | Finding site | True | Structure of choana (body structure) | Inferred relationship | Some | 2 | 
| Arrhinia with choanal atresia and microphthalmia syndrome (disorder) | Finding site | True | Structure of choana (body structure) | Inferred relationship | Some | 1 | 
| Choanal atresia, hearing loss, cardiac defect, craniofacial dysmorphism syndrome (disorder) | Finding site | True | Structure of choana (body structure) | Inferred relationship | Some | 1 | 
| Bilateral choanal atresia | Finding site | True | Structure of choana (body structure) | Inferred relationship | Some | 1 | 
| Structure of mucous membrane of choana (body structure) | Is a | True | Structure of choana (body structure) | Inferred relationship | Some |  | 
| Structure of left choana | Is a | True | Structure of choana (body structure) | Inferred relationship | Some |  | 
| Structure of right choana | Is a | True | Structure of choana (body structure) | Inferred relationship | Some |  | 
| Lymphedema, posterior choanal atresia syndrome (disorder) | Finding site | True | Structure of choana (body structure) | Inferred relationship | Some | 2 | 
| Repair of choanal atresia (procedure) | Procedure site - Direct (attribute) | True | Structure of choana (body structure) | Inferred relationship | Some | 1 | 
| Choanal atresia, athelia, hypothyroidism, delayed puberty, short stature syndrome (disorder) | Finding site | True | Structure of choana (body structure) | Inferred relationship | Some | 5 | 
| CT of choana | Procedure site - Direct (attribute) | True | Structure of choana (body structure) | Inferred relationship | Some | 1 | 
| Computed tomography of choana with contrast (procedure) | Procedure site - Direct (attribute) | True | Structure of choana (body structure) | Inferred relationship | Some | 1 |