A mucinous cystadenoma in rectal cuff of a patient with familial adenomatous polyposis

Introduction

Familial adenomatous polyposis (FAP) may be associated with some extracolonic manifestations which in this vein, it is known as Gardner’s syndrome. To our knowledge, so far, there is no report of mucinous cystadenoma in association with FAP.

Case presentation

We report a 31-year-old woman with FAP who underwent total proctocolectomy with ileal pouch-anal anastomosis 5 years earlier. During endoscopic surveillance, she was found to have a submucosal lesion in rectal cuff.

Results

Endoscopic ultrasound (EUS) revealed a round submucosal anechoic lesion measuring about 3 cm originating from the second layer of the rectal cuff. Surgical resection was performed and a cystic tumor was removed. Histologic examination was consistent with mucinous cystadenoma.

Conclusion

FAP can be associated with mucinous cystadenoma.