To review the clinical and radiologic features of internal hernia and to derive useful radiographic and CT criteria to assist in diagnosis.
Internal hernia is an important and underdiagnosed condition .Although internal hernias have an overall incidence of less than 1%,
they constitute up to 5.8% of all small-bowel obstructions,
if left untreated,
have been reported to have an overall mortality exceeding 50% if strangulation is present .To complicate matters,
the incidence of internal hernias is increasing because of a number of relatively new surgical procedures now being performed,
including liver transplantation and...
Imaging findings OR Procedure details
In the broad category of internal hernias are several main types,
as traditionally described by Meyers ,
based on location.
using historical data,
these consist of paraduodenal (53%),
foramen of Winslow (8%),
transmesenteric and transmesocolic (8%),
and retroanastomotic (5%) (Fig.
with the overall incidence of internal hernias being 0.2–0.9%.
The other 7% described by Meyers included paravesical Hernias.(Fig1)
It is important for radiologists to be familiar with and to understand the various types of internal hernias and their imaging features so that prompt and accurate diagnosis of these conditions can be made.
Martin L et al(2006) Review of Internal Hernias: Radiographic and Clinical Findings.