Date of Presentation:9/1/2021

Attending pathologist: Anil Parwani, MD, PhD, MBA

Presented by: Nermeen Chaudhry, B.A

Prepared by: Bindu Challa, M.B.B.S



A 47 year old male with history of End Stage Renal Disease (ESRD) received a kidney transplant, and upon follow-up stent removal, cystoscopy showed a 2 cm papillary tumor at left bladder neck. Transurethral resection of bladder tumor (TURBT) was performed.


The specimen is designated "bladder neck mass" and consists of an aggregate of irregularly shaped tan soft tissue fragments which measures 1.7 x 1.0 x 0.6 cm.

What is the most likely diagnosis?

  1. Primary adenocarcinoma of bladder
  2. Metastatic colorectal adenocarcinoma
  3. Villous adenoma of bladder
  4. Papillary urothelial carcinoma with villoglandular differentiation
  5. Extensive cystitis glandularis with intestinal metaplasia
Villous adenoma of bladder