Year : 2004 | Volume
: 14 | Issue : 1 | Page : 87--88
Radiological quiz - abdominal imaging
U Hemal, R Anand, MK Narula, AZ Siddiqui
Dept of Radio-diagnosis, Lady Hardinge Medical College and SK Hospital, New Delhi, India
E-90, Ansari Nagar, AIIMS Campus, New Delhi-110 029
|How to cite this article:|
Hemal U, Anand R, Narula M K, Siddiqui A Z. Radiological quiz - abdominal imaging.Indian J Radiol Imaging 2004;14:87-88
|How to cite this URL:|
Hemal U, Anand R, Narula M K, Siddiqui A Z. Radiological quiz - abdominal imaging. Indian J Radiol Imaging [serial online] 2004 [cited 2020 Feb 23 ];14:87-88
Available from: http://www.ijri.org/text.asp?2004/14/1/87/30306
A 45 day old male child presented with distension of abdomen since birth without any history of bladder or bowel complaints. On examination, abdomen was tense and distended.
Thoracoabdominal Duplication Cyst
X-Ray abdomen revealed soft tissue haze and bowel loops displaced toward left side. USG abdomen showed multiple, variable size, round to tubular sonolucent lesions smooth in outline, adjacent to bowel loops. CT scan revealed multiple varying size cysts, few of them multiloculated, smooth walled with enhancement, Coronal reconstructed image of CT abdomen showed tubular cystic lesions with extension to posterior mediastinum. Vertebral bodies and their appendages and other solid organs in abdomen, lung fields and heart were seen normal.
Based on these findings possibility of thoraco-abdominal duplication cuyst or lymphangioma was considered. Surgery was performed. Thoraco-abdominal duplication cyst was the per operative diagnosis.
Enteric duplication cysts are uncommon congenital abnormalities hypothesized to be due to abnormal canalization of gastro intestinal tract during embryological development when solid gastrointenstinal tract at this stage becomes hollow tube of 8 weeks embryo Abnormal canalization leads to formation of 2 channels, which persists as duplication cyst. Enteric duplication is a true duplication, which has well-developed muscle wall with my-entric plexus and is lined by oesophageal, gastric or intestinal mucosa . Such duplication with vertebral anomalies is neuroentric and results from in-complete separation of fore gut from notochord. This contains both neural and gastrointestinal element and is connected by a stalk to the meninges. It may be limited to the cyst as a blind sac or may extend below time diaphragm and either end blindly or communicate with the intestinal tract. Extra-intestinal anomalies associated with duplication cyst are uncommon though vertebral defect may exist.
The various types of enteric duplication cyst are double barrel, tubular and spherical and site can be stomach, oesophagus or colon 20% of cyst communicate with bowel lumen, 85% cases reported are of single cyst, 35% showed lining of gastric mucosa .
Barium studies generally reveal mass effect on bowel caused by duplication cysts. Computed tomography can be used to know the extent of the disease as in our case it revealed posterior mediastinal extension of duplication cyst, which was not confirmed on ultrasound. Sonographically duplication cysts of the stomach and ileum rarely have been reported prevailing as cystic intrabdominal masses . The differential diagnosis for such a finding include mesenteric or omental cyst.
Ultrasound may provide more specific information as wall of anechoic cyst may demonstrate echogenic line representing gastric mucosa . Echogenic material within the cyst probably represents haemorrhage or inspissated secretion . Computed tomography and magnetic resonance imaging demonstrate cystic and non vascular nature of the lesion and clearly demonstrate precise size, location in relation to adjacent organs and tans-diaphragmatic extension. Technetium 99m pertechnetate scintigraphy demonstrates gastric mucosa in cyst thereby confirming pre-operative diagnosis.
About 85% of patient with enteric duplication cysts eventually become symptomatic and may present with pain, bleeding and as an intussusceptions.
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