The Department of Pathology, one of the most important departments in the Sichuan Cancer Hospital, is undertaking the pathological diagnosis in the process of medical treatment, including the pathologic diagnosis based on biopsy, detachment and cytology of fine needle aspiration (FNA), to provide specific diagnosis of disease features or death causes. As the pathologic report is an explicit diagnosis, it serves for clinical doctors to adopt therapeutic schedule, and interpret clinical prognosis, symptoms or death reasons. The authority of pathological diagnosis makes it a key role among all diagnostic methods. Therefore, the quality of pathological diagnosis has a significant influence on the medical quality of the whole hospital and relevant clinical departments.