Hellow!My brother had a operation,about 9 months ago.He had a thyroglossal cyst on his neck,and he had to go though the sistrunk operation.He was 3 and a half years old.The doctors said that there was no infection,whatsoever,and if the cyst would grow back again ,it would take 3 months,time.3 monthes passed,there was no sign of danger,but now 9months after the operation there is this mass on his neck,its not red or anything,but it is located in the excat same place as the mass was before.The operation was done in nepal,but now we are loacated in ukraine,we cant contact the doctor who did his operation.If you,would please take your time,and send us back a reply we would be really glad...Thankyou!