| SECTION | Item or Ref ID | Value or text | 
| Identification | 
| TA code | A15.3.02.021 | 
| Entity ID number | THA:7182 | 
| FMA identifier | FMA:56797 | 
| Type of entity | Immaterial entity | 
| Language | 
| TA98 Latin preferred term | aditus antri mastoidei | 
| TA98 Latin precursor term | aditus ad antrum mastoideum | 
| TA98 English equivalent | aditus to mastoid antrum | 
| Properties | 
|  Bilaterality | This entity has left and right instances. | 
|  Immaterial | This entity is an immaterial object (no mass). | 
| Notes | 
| TA98 RAT note | The Latin precursor aditus ad antrum mastoideum, and its English equivalent, contained a preposition, which is not compatible with the rules for Regular Anatomical Terminology. | 
| TA98 Hierarchy | 
| A01.0.00.000 | 
| A15.0.00.000 | 
| A15.3.00.001 | 
| A15.3.02.001 | 
| A15.3.02.002 | 
| A15.3.02.020 | 
| A15.3.02.021 | 
                aditus antri mastoidei
               | 
| A15.3.02.022 | |
| A15.3.02.023 | 
| FMA Taxonomy | 
| FMA:62955 | 
                anatomical entity
               | 
| FMA:61775 | 
                physical anatomical entity
               | 
| FMA:67112 | 
                immaterial physical anatomical entity
               | 
| FMA:5897 | 
                anatomical space
               | 
| FMA:9338 | 
                anatomical conduit
               | 
| FMA:3724 | 
                anatomical orifice
               | 
| FMA:53133 | 
                orifice of skull
               | 
| FMA:56797 | 
                aditus to mastoid antrum
               | 
| Date: 29.01.2013 |