Adenoma-carcinoma Sequence in the Bladder After Augmentation Cystoplasty

Area of Science:

• Urology
• Oncology
• Gastroenterology

Background:

• Augmentation ileocystoplasty is a surgical procedure used to enlarge the bladder, often for conditions like tuberculous contracted bladder.
• Long-term complications of ileocystoplasty can include the development of tumors within the augmented bladder.
• The adenoma-carcinoma sequence is a well-established pathway for colorectal cancer development.

Observation:

• A 64-year-old woman developed bladder tumors 46 years after undergoing augmentation ileocystoplasty at age 18.
• Initially, tubulovillous adenomas were detected and resected at the ileovesical anastomosis site after 44 years.
• Two years later, recurrent bladder tumors were diagnosed as adenocarcinomas.

Findings:

• This case presents the first documented instance of an adenoma-carcinoma sequence histopathologically confirmed in the bladder following augmentation cystoplasty.
• The observed multistep carcinogenesis in the bladder mirrors the known pathway of intestinal carcinogenesis.
• The patient ultimately required radical cystectomy due to tumor recurrence and extensiveness.

Implications:

• Augmentation cystoplasty patients require long-term surveillance for bladder cancer development.
• The findings suggest that intestinal-type carcinogenesis mechanisms may operate in the bladder after augmentation ileocystoplasty.
• This case underscores the importance of understanding long-term oncogenic risks associated with urinary diversion procedures.