| The structure so formed is the rudiment of the pneumatocyst. |
| It has however no communication with the enclosed cavity of the pneumatocyst. |
| Rhizophysa filiformis, pink, with deep red patch surrounding the aperture of the pneumatocyst. |
| This article reviews the typical imaging characteristics of a vertebral pneumatocyst, an unusual, intraosseous gas-containing lesion of uncertain etiology. |
| Incidentally, a well-defined lytic lesion was seen in the sacrum adjacent to the left sacroiliac joint consistent with a pneumatocyst. |
| In the next stage the air-cavity of the pneumatocyst becomes established within the epiblast. |
