<prompt> Pseudomyxoma peritonei occurs due to:Mucinous cystadenoca ovaryCa colonAdenoma stomachPancreatic adenocarcinoma  <response>: Ans: A Mucinous cystadenoca ovary Ref: Shows Textbook of Gynecology 15th ed pg 375Explanation:MUCINOUS TUMOURS OF OVARYMultiloculated cyst lined by columnar epitheliumCut surface shows multilocular and honey comb appearanceCan grow to large size 5 to 10 kgs. pedunculated.Usually unilateral Bilateral in 5 casesUsually Benign 5 to 10 malignant.Bilateral -- metastasis from GI tract, mucocele of appendix, primary adenoca appendix.In women 30 to 60 years.Has a glistening surface.If tumor ruptures it may lead to formation of pseudomyxoma peritonei and viscera show extensive adhesions.Appendicectomy prevents this condition as mucocele of appendix often causes this complication. 