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What is the sonographic finding seen in the image?
A large fetal intra-abdominal cyst is seen.
What could the possible differential diagnosis?
Fetal enteric duplication cyst, mesenteric cyst, omental cyst. As it is a male fetus, fetal ovarian cyst won't be considered as differential.
What sonographic characteristic may suggest a duplication cyst?
'gut signature' i.e. wall of the cyst representing similar echopattern to bowel wall.
Abdominal cyst in utero - separate from urinary bladder, kidneys in a male fetus.