Review of several facts of epidemiological nature, from a study on bladder urothelial carcinoma cases detected over the period 1983-1990 in our centre, a reference hospital serving the Bilbao area. Certain data recently published by the Euskadi Cancer Register allowed us to establish some considerations related to the presence of this entity in our setting. Its incidence nears the highest rates in industrial countries. Age distribution, but no the men/female ratio, is similar to that in other settings. Overall, no difference was detected in sex-related survival. But, we corroborate that the youngest groups have the best prognosis. Also, an analysis is made of the association between age at diagnosis and several clinical and histopathological parameters.