Firstly one cannot say for sure why the stone was not removed. That is for the surgeon to clarify why it was not removed. Regarding the loss of sensation of in his leg sometimes intense nerve block
occurs in spinal or epidural block. Sometimes while inserting the needle one might hit the nerve root
leading to the above symptoms. The patient might have movement in the leg but the sensation will take time to regain. This is a uncommon presentation. Dont worry severe injury
to nerve is very unlikely. two days have passed. normal sensations will return soon.