[Cysts of the spleen. Spontaneous involution checked by imaging]

The splenic cysts are rare diseases and the diagnosis is now easier with modern imaging modalities. The authors report two cases of asymptomatic splenic cysts. The spontaneous involution in less than 3 years has been followed by CT Scan. This possible evolution which has never been described, the improvements of the splenic surgery and the risk of serious infectious complications after splenectomy, must modify the indications of the treatment. A US or CT follow up can be purposed for non symptomatic cyst and a partial splenectomy when these lesions are clinically symptomatic.