Radiology Teaching Files > Case 642077

Contributed by: Children's Hospital Omaha, Radiologist, Omaha Childrens, Creighton University and UNMC, Nebraska, USA.
History: Infant presenting with billious vomiting

Fig. 1: Near water attenuation smooth walled mass mass between the duodenum and the IVC

Duodenal duplication cyst Incidence:
5% of all small bowel duplications are in the duodenumduplications

noncommunicating spherical cyst; may contain ectopic gastric mucosa in 21%, small bowel mucosa, pancreatic tissue

obstruction, ,pain , vomiting ,palpable abdominal mass
-hemorrhage (due to peptic ulceration)
-jaundice (due to biliary obstruction)
-pancreatitis (due to ectopic pancreatic tissue)
-25% have gastric mucosa. Peptic ulceration can cause pain , bleeding

Site: on mesenteric side of anterior wall of 1st and 2nd portion of duodenum
- mass in concavity of duodenal C-loop
- compression ,extrinsic mass efect and displacement of 1st and or 2nd portion of duodenum superiorly and anteriorly

CT appearnce:
-Near water attenuation smooth walled mass between the duodenum and the IVC. The attenuation increases when it contains hemmorhage, proteinaceus or purulent material.

DDx: pancreatic cyst, pancreatic pseudocyst, choledochal cyst, choledochocele, duodenal intramural tumor, pancreatic tumor


Dahnert, Wolfgang. Radiology Review Manual 4th Edition. Williams and Wilkins, 1999

Submitted by: Paras Khandhar, Medical Student, Creighton University Medical Center
Phillip J. Silberberg, M.D, Radiology, Children's Hospital, Omaha, NE
Benjamin Silberberg

No comments posted.
Additional Details:

Case Number: 642077Last Updated: 07-26-2006
Anatomy: Gastrointestinal (GI)   Pathology: Congenital
Exam Date: 01-01-2000Access Level: Readable by all users
Keywords: duodenal duplication cyst

The reader is fully responsible for confirming the accuracy of this content.
Text and images may be copyrighted by the case author or institution.
You can help keep MyPACS tidy: if you notice a case which is not useful (e.g. a test case) or inaccurate, please send email to