Download - Duodenum and duodenal diverticulum
Duodenum and Duodenal Diverticulum
By
Munivenkatesh.P
Anatomy • C shaped
• Initial part of small
intestine
• Continuous with
stomach
• Situated in
epigastric and
umbilical region
Blood supply
Lymph drainage Pyloric node
Hepatic node
Celiac node
Superior mesenteric node
Pathology • Various disorders :
oDuodenal ulcer
oDuodenal diverticulum
oDuodenal obstruction
oDuodenitis
Duodenal Diverticulum• It is a pouch
attached to the
duodenum, the first
part of the small
intestine just pass
the stomach.
• 2 type : intramural
and extramural
Extramural diverticulum • The common type which is
present in at least 6% of individuals, is one that sticks out from the duodenum, similar to the more common colonic diverticula.
• This is referred to as an "extramural" diverticulum.
• Extramural diverticula may vary in size from a few millimeters to a few centimeters.
• They usually are located in the area around the Papilla of Vater where the bile and pancreatic ducts enter the duodenum.
Intramural diverticulum • A second, rare type of diverticulum is
referred to as an "intramural" diverticulum. It
does not protrude from the duodenum.
• Rather, it protrudes into the duodenal lumen
(the hollow inside of the duodenum through
which digesting food flows).
• Both types of diverticula, extramural and
intramural, communicate with the lumen of
the duodenum so that contents of the
duodenum can enter the diverticulum.
Symptoms • 80 to 90% of patients are asymptomatic
• One of the main symptoms include upper
abdominal pain, right upper quadrant tenderness
• Often accompanied by a sense of fullness or
discomfort, and may have nausea, vomiting, or
vomiting
• Symptoms tend to appear in the diet or exacerbate,
relieved by vomiting.
• Diverticulum oppression of the common bile duct in
addition to intermittent abdominal pain, and can be
intermittent jaundice.
Symptoms
Causes • The cause of extramural diverticula is not
definitely known; however, they are
believed to be acquired (not present from
birth) due to a herniation (protrusion) of the
duodenum through a defect in the muscle of
the wall of the duodenum, perhaps in an
area where arteries pass through the
intestinal muscle to nourish the lining of the
intestine.
• Due to the different types of diverticula, its
causes are also different.
Congenital diverticulum • Congenital diverticulum:
a rare congenital
developmental
abnormalities at birth that
exist.
• Intestinal mucosa
submucosa and muscular
the diverticular wall
structure including
identical with the normal
intestinal wall, also known
as a true diverticulum.
Primary and secondary diverticulum
• Primary diverticulum: congenital anatomical
defects due to part of the bowel wall, out
due to the the intestines increased pressure
leaving the premises intestinal mucosa and
submucosa tissue prolapse formation of
diverticula. Such diverticular wall muscularis
tissue is absent or weak.
• Secondary diverticulum: duodenal ulcer
scar contraction or the chronic cholecystitis
adhesions caused by traction, it occurred in
the duodenum, the first one, also known as
false diverticula.
Complications • If the diverticulum is very close to the Ampulla of Vater,
patients more frequently develop gallstones, particularly in the
bile duct, and may develop all of the complications of
gallstones:
o biliary colic (the typical pain of obstruction of the bile
ducts),
o cholecystitis (inflammation of the gallbladder), and
o cholangitis (inflammation of the bile ducts due to the
spread of bacteria into the ducts from the duodenum).
• Pancreatitis also may occur. These complications are believed
to be due to interference by the diverticula with the normal
function of the bile and pancreatic ducts.
Diagnosis • Barium X rays
• Endoscopy
• Ultrasonography
• Computerized tomographic (CT) scans
• Magnetic resonance imaging (MRI) studies
Barium X ray
CT scan and endoscopy
MRI scan
Treatment • If treatment is necessary, extramural diverticula can
be surgically removed from the outside of the
duodenum.
• The diverticula also may be inverted into the lumen
of the duodenum and removed through an incision
in the wall of the duodenum.
• (Sometimes, the diverticulum is inverted but left
attached to the wall of the duodenum and
protruding into the duodenum.)
• In case of multiple diverticula, billroth II
gastrectomy is performed
Removal of diverticulum
Billroth 2 gastrectomy