[Associated renal malformations. Renal agenesis and ectopy]

The association of ectopia and renal agenesis is not a common occurrence. Incidence is variable although in the clinical practice it usually represents 1/900-1500 visits, and occurs in the absence of one kidney in 10% of pelvic ectopias and accompanied by genital deformations in 50% of cases. A large number of cases present no symptoms and the diagnosis happens by chance during an X-ray examination for other reasons. In further occasions other urological manifestations lead to the discovery. Treatment is usually conservative and expectant, and surgery becomes necessary only when is inductive of infectious and obstructive symptoms that might compromise the organ's viability and the patient's life.