Mucinous Cystadenoma of the Vermirorm Appendix with Localized Pseudomyxoma Peritonei. A Case Report.

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A 74-year-old woman admitted to our hospital due to right lower abdominal pain, constipation and rapid growing abdominal mass. High grade fever, tenderness on the lowerabdomen, severe inflammatory sign on laboratory data were observed on admission.Abdominal ultrasonography and CT scan showed a solid mass at a size of 15×7×7cmcompressing the ascending colon, suggesting pericecal abscess. High fever alleviated oneweek after antibiotics therapy, and the mass size reduced gradually. Colonoscopy andbarium enema examination reveaied smail round elevation at the orifice of the vermiformappendix and disappearance of extracolonic compression by the mass. From these findings, appendiceal tumor and pericecal abscess with ileocecal displacernent was stronglysuspected. On laparotomy, the appendix was located retrocecally on the cecum, andstrongly adhered to the ascending colon. Right hemicolectomy was performed. Inside theswollen appendix, there was mucinous alkaline fluid in a volume of 2ml. The pathologicaldiagnosis was mucinons cystadenoma of the vermiform appendix accompanied by localizedpseudomyxoma. We herein reported the rare case of mucinous cystadenoma of thevermiform appendix with inflammatory mass witch was the dominant sign in the clinicalcourse.
社団法人日本消化器内視鏡学会の論文