Abstract
Villous tumor of the appendix is uncommon. A 68-year-old woman was admitted because of abdominal pain localized at McBurney's point. Blood tests showed a white blood cell count of 15, 000/μl and C-reactive protein of 0.6mg/dl consistent with a diagnosis of acute appendicitis. Ultrasonography of the cecum and appendix showed irregular wall thickening with a hypoechoic pattern. We suspected a cecal tumor associated with acute appendicitis. Barium enema and colonoscopy disclosed a villous tumor of the orifice of the appendix, and biopsy specimens of the tumor showed tubulovillous adenoma. Laparoscopic partial cecoctomy was conducted, considering the possibility of early-stage cancer. The villous tumor was located from the distal end of the appendix to the cecum. Histologically, it was negative for malignancy. Ultrasonography was useful in preoperative diagnosis.
