- Name the examination.
- Name the space labelled ‘A’.
- What is normal measurement for ‘A’.
- What is the content of ‘A’
- What are the boundaries for ‘A’
- Double contrast barium enema in lateral projection.
- Presacral space.
- Not more than 15 mm.
- Content: mesenchymal tissue, lymph node, fat, blood vessels and nerve plexus.
- Superior boundary: peritoneal reflection, inferior boundary: levator ani and coccygeus muscle and lateral boundaries: ureter and iliac vessels