Abdominal hernias are a common clinical problem, The main types of abd
ominal hernias are external or abdominal wall hernias, which involve p
rotrusion of abdominal contents through a defect in the abdominal wall
; internal hernias, which involve protrusion of viscera through the pe
ritoneum or mesentery and into a compartment in the abdominal cavity;
and diaphragmatic hernias, which involve protrusion of abdominal conte
nts into the chest, Clinical diagnosis of abdominal hernias can be dif
ficult, However, plain radiography, radiography performed after admini
stration of barium, and computed tomography allow evaluation I of susp
ected abdominal hernias and detection of those that are clinically occ
ult, The anatomic location of the hernia, the contents, and complicati
ons such as incarceration, bowel obstruction, volvulus, and strangulat
ion can be demonstrated with radiologic examination, Occasionally, com
plications such as neoplasms or inflammatory conditions can be identif
ied in the hernial contents, With abdominal imaging modalities, a vari
ety of abdominal hernias can be confidently diagnosed.