My Sister Is 14 Years Old.She Has A Bone Tumor

my sister is 14 years old.She has a bone tumor on higher cheek bone under her left eye .The tumor size is about round(2r=1") and within a few days she will be admitted to hospital for operation. what type of operation should be suggested so that the mark will not be visible?If there is mark, what should do to remove that ? is there any tips to do before operation to reduce mark?