Having said that, a general practitioner is responsible for referring the patients to some specialist if he thinks the presented symptoms indicate some disease. And any negligence on part of GP in this regard is reprehensible through medical negligence claims. Oncologists, however, also have a duty to take immediate actions when patients are referred to them, for any further delay may cause disease to exacerbate. In some cases, cancer misdiagnosis do not show any noticeable bad impacts on patient’s health until a long time passed, while certain cancer types such as colonic cancer and breast cancer could be unpredictable and aggressive over time. In view of the seriousness of patient’s condition, clinical negligence claims can threat the professional career of liable doctors.