Nested variant of urothelial cell carcinoma (NVUC) is a rare histological entity, with about 80 reported cases.
It has a deceptively benign appearance with an aspect characterized by confluent small nest or urothelial's cell tubules. This tumour often resembles inverted papilloma, von Brunn's nests (VBNs), cystitis cystica, nephrogenic metaplasia and sometimes usual transitional cell cancer. It is very important to be able to distinguish between benign lesions and nested variant bladder cancer because, in spite of its bland morphology, there is evidence that it behaves aggressively.
Written by:
De Berardinis E, Busetto GM, Giovannone R, Antonini G, Di Placido M, Gentile V. Are you the author?
Sapienza Rome University, Policlinico Umberto I, Rome, Italy.
Reference: Can Urol Assoc J. 2012 Apr;6(2):E57-60.
doi: 10.5489/cuaj.11094
PubMed Abstract
PMID: 22511434