extensive – adj. large in size or amount : very full or complete
transplant – medical : to perform a medical operation in which an organ or other part that has been removed from the body of one person is put it into the body of another person
recipient – n. a person who receives something
plastic surgery – n. surgery that improves or repairs the form or appearance of body parts
critical – adj. extremely important
third-degree – adj. causing severe injury
positive – adj. thinking that a good result will happen : hopeful or optimistic