My baby was a retinablastoma patient, an eye cancer. He has been operated in his left eye and currently doing absolutely fine. But few days back, we have noticed a small muscle pea size lump and local pediatrician told that it is nothing to worry about. But now, we have noticed another same type of small pea size muscle lump in the right side of the head. Can you kindly tell me if this is anything serious? If yes, then what that can be? Also if i am supposed to consult with any doctor then what doctor that would be? M.D or nuro surgeon or what? Please reply ASAP.