[Bilateral ureteral pseudodiverticulosis with transitional cell tumour]

We present with a case of bilateral ureteral pseudodiverticulosis associated with a transitional cell tumour in the bladder. From a pathogenic point of view, there is currently a trend to consider reactive hyperplasia of transitional cell epithelium as secondary to chronic inflammatory processes which would form such pseudodiverticula. On account of that association it is advisable to perform follow-up tests on these patients to enable us to reach an early diagnosis of these tumours.