Gastrointestinal
Presacral space
0-15 y/o
<5 mm
Barium enema
Reference
Eklöf O, Gierup J. The retrorectal soft tissue space in children: normal variations and appearances in granulomatous colitis. Am J Roentgenol Radium Ther Nucl Med. 1970;108
Pubmed ID: 5415938