Unfortunately, it is not uncommon for certain kinds of cancers to go misdiagnosed until the damage to the patient is either irreversible or requires extremely aggressive treatment. Around 12% of U.S. cancer patients misdiagnosed a year with the highest rates involving breast, ovarian and cervical cancer. Diagnosing certain types cancer can be difficult, and your physician may not have the skill to do so correctly. Research by the American Medical Association shows that the number of diagnostic errors is growing and that such diagnosis results in as many as 80,000 deaths each year.