| Inbound Relationships | Type | Active | Source | Characteristic | Refinability | Group | 
| Entire choana | Is a | True | Structure of choana | Inferred relationship | Existential restriction modifier |  | 
| Choanal atresia | Finding site | True | Structure of choana | Inferred relationship | Existential restriction modifier | 1 | 
| Atresia of the posterior nares | Finding site | False | Structure of choana | Inferred relationship | Existential restriction modifier | 1 | 
| Choanal atresia with radial ray hypoplasia | Finding site | False | Structure of choana | Inferred relationship | Existential restriction modifier | 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 | Inferred relationship | Existential restriction modifier | 2 | 
| Choanogram | Procedure site | False | Structure of choana | Inferred relationship | Existential restriction modifier | 1 | 
| Bleeding point in nose | Finding site | False | Structure of choana | Inferred relationship | Existential restriction modifier |  | 
| Choanal stenosis | Finding site | False | Structure of choana | Inferred relationship | Existential restriction modifier | 1 | 
| Finding of posterior choanae | Finding site | True | Structure of choana | Inferred relationship | Existential restriction modifier | 1 | 
| Choanae patent | Finding site | True | Structure of choana | Inferred relationship | Existential restriction modifier | 1 | 
| Choanae non-patent | Finding site | True | Structure of choana | Inferred relationship | Existential restriction modifier | 1 | 
| Repair of choanal atresia by intranasal approach | Procedure site | False | Structure of choana | Inferred relationship | Existential restriction modifier | 1 | 
| Lysis of adhesions of choanae of nasopharynx | Procedure site | False | Structure of choana | Inferred relationship | Existential restriction modifier | 1 | 
| Choanal polyp | Finding site | True | Structure of choana | Inferred relationship | Existential restriction modifier | 1 | 
| Congenital stenosis of choanae | Finding site | False | Structure of choana | Inferred relationship | Existential restriction modifier | 1 | 
| Repair of choanal atresia by transpalatal approach | Procedure site | False | Structure of choana | Inferred relationship | Existential restriction modifier | 1 | 
| Malignant tumor of anterior wall of nasopharynx | Finding site | False | Structure of choana | Inferred relationship | Existential restriction modifier |  | 
| Tumor of anterior wall of nasopharynx | Finding site | False | Structure of choana | Inferred relationship | Existential restriction modifier |  | 
| Benign tumor of anterior wall of nasopharynx | Finding site | False | Structure of choana | Inferred relationship | Existential restriction modifier |  | 
| Malignant neoplasm of anterior wall of nasopharynx NOS | Finding site | False | Structure of choana | Inferred relationship | Existential restriction modifier |  | 
| Choanal atresia, unspecified | Finding site | False | Structure of choana | Inferred relationship | Existential restriction modifier | 1 | 
| Choanal atresia NOS | Finding site | False | Structure of choana | Inferred relationship | Existential restriction modifier | 1 | 
| Lysis of adhesions of choanae of nasopharynx | Procedure site | False | Structure of choana | Inferred relationship | Existential restriction modifier | 1 | 
| Lysis of adhesions of choanae of nasopharynx | Procedure site | False | Structure of choana | Inferred relationship | Existential restriction modifier | 2 | 
| Lysis of adhesions of choanae of nasopharynx | Procedure site | False | Structure of choana | Inferred relationship | Existential restriction modifier | 1 | 
| Lysis of adhesions of choanae of nasopharynx | Procedure site | False | Structure of choana | Inferred relationship | Existential restriction modifier | 2 | 
| Lysis of adhesions of choanae of nasopharynx | Procedure site | False | Structure of choana | Inferred relationship | Existential restriction modifier | 1 | 
| Lysis of adhesions of choanae of nasopharynx | Procedure site | False | Structure of choana | Inferred relationship | Existential restriction modifier | 2 | 
| Lysis of adhesions of choanae of nasopharynx | Procedure site | False | Structure of choana | Inferred relationship | Existential restriction modifier | 2 | 
| Lysis of adhesions of choanae of nasopharynx | Procedure site | False | Structure of choana | Inferred relationship | Existential restriction modifier | 1 | 
| Lysis of adhesions of choanae of nasopharynx | Procedure site | False | Structure of choana | Inferred relationship | Existential restriction modifier | 1 | 
| Lysis of adhesions of choanae of nasopharynx | Procedure site | False | Structure of choana | Inferred relationship | Existential restriction modifier | 2 | 
| Lysis of adhesions of choanae of nasopharynx | Procedure site | False | Structure of choana | Inferred relationship | Existential restriction modifier | 1 | 
| Lysis of adhesions of choanae of nasopharynx | Procedure site | False | Structure of choana | Inferred relationship | Existential restriction modifier | 2 | 
| Choanogram | Procedure site - Direct | False | Structure of choana | Inferred relationship | Existential restriction modifier | 1 | 
| Repair of choanal atresia by intranasal approach | Procedure site - Direct | True | Structure of choana | Inferred relationship | Existential restriction modifier | 1 | 
| Lysis of adhesions of choanae of nasopharynx | Procedure site - Indirect | False | Structure of choana | Inferred relationship | Existential restriction modifier | 1 | 
| Repair of choanal atresia by transpalatal approach | Procedure site - Direct | True | Structure of choana | Inferred relationship | Existential restriction modifier | 1 | 
| Congenital stenosis of choanae | Finding site | False | Structure of choana | Inferred relationship | Existential restriction modifier | 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 | Inferred relationship | Existential restriction modifier | 2 | 
| Choanal atresia with radial ray hypoplasia | Finding site | False | Structure of choana | Inferred relationship | Existential restriction modifier | 2 | 
| Choanal atresia NOS | Finding site | False | Structure of choana | Inferred relationship | Existential restriction modifier | 1 | 
| Choanogram | Procedure site - Direct | True | Structure of choana | Inferred relationship | Existential restriction modifier | 1 | 
| Choanal atresia, unspecified | Finding site | False | Structure of choana | Inferred relationship | Existential restriction modifier | 1 | 
| Lysis of adhesions of choanae of nasopharynx | Procedure site - Indirect | True | Structure of choana | Inferred relationship | Existential restriction modifier | 1 | 
| Choanal polyp | Finding site | False | Structure of choana | Inferred relationship | Existential restriction modifier | 1 | 
| Choanal stenosis | Finding site | True | Structure of choana | Inferred relationship | Existential restriction modifier | 1 | 
| Atresia of the posterior nares | Finding site | False | Structure of choana | Inferred relationship | Existential restriction modifier | 1 | 
| Choanal atresia | Finding site | False | Structure of choana | Inferred relationship | Existential restriction modifier | 1 | 
| Congenital stenosis of choanae | Finding site | False | Structure of choana | Inferred relationship | Existential restriction modifier | 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 | Inferred relationship | Existential restriction modifier | 4 | 
| Choanal atresia with radial ray hypoplasia | Finding site | False | Structure of choana | Inferred relationship | Existential restriction modifier | 4 | 
| Atresia of the posterior nares | Finding site | False | Structure of choana | Inferred relationship | Existential restriction modifier | 2 | 
| Choanal atresia | Finding site | False | Structure of choana | Inferred relationship | Existential restriction modifier | 2 | 
| Congenital stenosis of choanae | Finding site | True | Structure of choana | Inferred relationship | Existential restriction modifier | 1 | 
| Intractable diarrhea with choanal atresia and eye anomaly syndrome | Finding site | False | Structure of choana | Inferred relationship | Existential restriction modifier | 7 | 
| Arrhinia with choanal atresia and microphthalmia syndrome | Finding site | False | Structure of choana | Inferred relationship | Existential restriction modifier | 4 | 
| Choanal atresia, hearing loss, cardiac defect, craniofacial dysmorphism syndrome | Finding site | False | Structure of choana | Inferred relationship | Existential restriction modifier | 4 | 
| Choanal atresia with radial ray hypoplasia | Finding site | True | Structure of choana | Inferred relationship | Existential restriction modifier | 1 | 
| Intractable diarrhea with choanal atresia and eye anomaly syndrome | Finding site | True | Structure of choana | Inferred relationship | Existential restriction modifier | 2 | 
| Arrhinia with choanal atresia and microphthalmia syndrome | Finding site | True | Structure of choana | Inferred relationship | Existential restriction modifier | 1 | 
| Choanal atresia, hearing loss, cardiac defect, craniofacial dysmorphism syndrome | Finding site | True | Structure of choana | Inferred relationship | Existential restriction modifier | 1 | 
| Choanal atresia of bilateral nasal passages | Finding site | True | Structure of choana | Inferred relationship | Existential restriction modifier | 1 | 
| Structure of mucous membrane of choana | Is a | True | Structure of choana | Inferred relationship | Existential restriction modifier |  | 
| Structure of left choana | Is a | True | Structure of choana | Inferred relationship | Existential restriction modifier |  | 
| Structure of right choana | Is a | True | Structure of choana | Inferred relationship | Existential restriction modifier |  | 
| Lymphedema, posterior choanal atresia syndrome | Finding site | True | Structure of choana | Inferred relationship | Existential restriction modifier | 2 | 
| Repair of choanal atresia | Procedure site - Direct | True | Structure of choana | Inferred relationship | Existential restriction modifier | 1 | 
| Choanal atresia NOS | Finding site | False | Structure of choana | Inferred relationship | Existential restriction modifier | 1 | 
| Choanal atresia, unspecified | Finding site | False | Structure of choana | Inferred relationship | Existential restriction modifier | 1 |