Meconium pseudocyst

Last revised by Abenezer Zinaye on 10 Feb 2022

Meconium pseudocyst formation is a complication that can occur with meconium peritonitis.


It occurs when the extruded meconium becomes walled off within the peritoneal space.

Radiographic features

Plain radiograph

May be seen as a rim calcified mass within the abdomen.

Antenatal ultrasound

Meconium pseudocyst may be sonographically seen as a relatively well-defined hypoechoic mass often surrounded by an echogenic calcified wall 2.

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Cases and figures

  • Case 1
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  • Case 2: barium meal
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  • Case 2: ultrasound
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