[Calicial diverticulum]

The authors present a series of five cases of calicial diverticuli with important radiological diameters, an entity which is not frequently described in literature. They analyse the symptoms which, because they do not posses characteristics of their own, correspond instead to the clinical picture of their complications. The radiological study is the basis of the diagnosis, when the diverticular cavity is refilled late, when the contrast of the same is drained slowly and when there is a communication with the pelvis or calix, hence the importance of the late plates. The treatment which should be expectant in asymptomatic cases and which leads us to opt for a cystectomy with excision of the epithelial bed and closure of the communication where surgery is indicated.