Hi and welcome to HCM.
I dont see how it can be related. this coin was probably out after few days. Splenomegaly
in children is most commonly caused by haematologic disorders such as autoimmune anaemia
or sme liver
disorders. It is in the beginning treated by medicines and blood transfusion
,but after nonsuccesful managment the surgery is the only option. But this is a routine procedure today and leaves minimalk consequences. WIsh you good health.