| SECTION | Item or Ref ID | Value or text | 
| Identification | 
| TA code | A15.3.02.028 | 
| Entity ID number | THA:7189 | 
| FMA identifier | FMA:55711 | 
| Type of entity | Immaterial entity | 
| Language | 
| TA98 Latin preferred term | antrum mastoideum | 
| TA98 English equivalent | mastoid antrum | 
| Properties | 
                Bilaterality
             | 
            This entity has left and right instances. | 
                Immaterial
             | 
            This entity is an immaterial object (no mass). | 
| TA98 Hierarchy | 
| A01.0.00.000 | 
| A15.0.00.000 | 
| A15.3.00.001 | 
| A15.3.02.001 | 
| A15.3.02.002 | 
| A15.3.02.028 | 
               
                antrum mastoideum
               
             | 
          
| A15.3.02.029 | |
| A15.3.02.030 | 
| FMA Taxonomy | 
| FMA:62955 | 
               
                anatomical entity
               
             | 
          
| FMA:61775 | 
               
                physical anatomical entity
               
             | 
          
| FMA:67112 | 
               
                immaterial physical anatomical entity
               
             | 
          
| FMA:5897 | 
               
                anatomical space
               
             | 
          
| FMA:67552 | 
               
                anatomical cavity
               
             | 
          
| FMA:24034 | 
               
                cavity of organ part
               
             | 
          
| FMA:55711 | 
               
                mastoid antrum
               
             | 
          
| Date: 29.01.2013 |