Divisions
The abdomen can be topographically divided into four quadrants or nine regions.
Four Quadrants
The median and transverse transumbilical planes divide the abdomen into four quadrants.
Nine Regions:
Meanwhile two transverse (transpyloric plane at L1 and the transtubercular plane at L5) and two sagittal planes (midclavicular line) divide the abdomen into the following nine regions:
Right Hypochondriac
Epigastric
Left Hypochondriac
Right Lumbar
Umbilical
Left Lumbar
Right Inguinal
Hypogastric
Left Inguinal
