As doctors at Massachusetts General Hospital treat victims of yesterday's bombings at the Boston Marathon, many are confident that the patient outcomes will be as optimal as possible.   Most of the victims suffered traumatic injuries to their lower extremities according to the trauma surgeons.   So far, doctors at Mass general have performed 4 amputations, and 2 more limbs are at rick of needing removal.  However, doctors remain hopeful today they can save those patients' legs.  Most of those being treated have been stabilized.   As of now, 3 persons, including an 8-year-old boy have died due to the bombings.