No matter what, doctors have a responsibility to give their patients hard truths about their health. The doctor's office is no place to spare someone's feelings. Doctors need to always be one hundred percent honest, even if it is hard to tell their patients. Whether it comes to cancer, obesity, or any other issues, doctor's should always be truthful.
Yes. Doctors have an ethical responsibility to be truthful with all patients, in all situations. The ability of a person to have a good quality of life when dealing with a disease or disorder is based solely on how good their treatment is, and in order to seek good treatment, a patient should be well informed of their disease or disorder from the diagnosing doctor.