Pseudomyxoma peritonei et pleuri (appendiceal mucinous cystadenoma)

Case contributed by Dr Chris O'Donnell


Perforated appendix in 2009 with emergency appendicectomy. Subsequent histology showed mucinous cystadenoma. Now abdominal distension.

Patient Data

Age: 47
Gender: Male

CT scan for staging in 2012

Gross mucinous material (not fluid) surrounding the liver, causing marked distortion to the hepatic contour. Note infiltration through the right hemidiaphragm (arrow) into the right hemithorax.


Original CT scan in 2009 when histological diagnosis was made

Small cystic lesion consistent with mucinous tumor involving the inverted stump of the appendix post emergency appendectomy.

Case Discussion

Pseudomyxoma peritonei that enters the pleural cavity has a much worse prognosis.

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Case information

rID: 19321
Published: 27th Aug 2012
Last edited: 14th Aug 2019
Inclusion in quiz mode: Included

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