Adenocarcinoma of the ileal pouch mucosa. A new diagnostic challenge

.Dear editor, We read with interest the manuscript recently published by O’Mahoney et al. entitled “Adenocarcinoma of the ileal pouch mucosa: case report and literature review” [1]. The authors well presented a case of adenocarcinoma of ileal pouch mucosa diagnosed after 13 years of pouch creation. They reviewed literature for true pouch adenocarcinoma, and a total of 27 patients have been described around the world. Of these, 63 % (17/27) had neoplasia in their original proctocolectomy specimen. Mean time of adenocarcinoma development was 8.9 years. Five-year survival after excision of the pouch was 70 %. In our experience of 112 ileal pouch anastomosis, we had one case of true pouch adenocarcinoma. A 71-year-old man was diagnosed of ulcerative colitis for 30 years; he underwent a total colectomy 26 years ago (on 1985). Patient course was complicated by chronic pouchitis medically treated. After 11 years of follow-up, primary sclerosing cholangitis diagnosis was done. During annual endoscopic control, a polypectomy was performed. At pathology, a wide area of high-grade dysplasia with a minute focus of adenocarcinoma polyp was observed. A magnetic resonance imaging was performed, and a mucosal thickening was observed. Considering oncological indication to remove the pouch, patient age, and technical difficulty to restore intestinal continuity, the patient underwent ileal pouch excision with end ileostomy. After 34 months of follow-up, the patient is alive with no local or systemic recurrence. In our experience, mean age at surgery was 37 years old with a mean follow-up of 123 months ...