Non-surgical treatment of a congenital splenic cyst.

A congenital splenic cysts in a 5.5 year old girl was aspirated under ultrasonographic guidance and injected with 150 mg Tetracycline (intended for IV use). Septation and gradual resorption of the cyst occurred during the following weeks, leaving small residual cysts which have remained stable for the last 12 months. Splenectomy and its possible complications were avoided.