Introduction:

Calyceal diverticulum is detected in 0,21% to 0.60% of excretory urogram.

Objectives:

To describe a patient with an incidental diagnosis of this anomaly and her follow up during 11 years.

Case presentation:

During the performance of an excretory urogram for studying a hydronefrosis in a seven years old girl, a calyceal diverticulum was detected in the contralateral kidney; and after 11 years of ultrasonographic follow-up there has been no modifications or complication related with the diverticulum.

Conclusions:

Calycial diverticulum is a congenital anomaly that can last years without presenting complications. That is why it must be treated conservatively.

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