Curative surgery is also applied within the scope of surgical oncology. However, the preliminary condition for applying curative surgery is that the disorder is limited to the organ or lymph nodes where it first appeared. Tumors may be completely removed from patients, provided that their boundaries are well determined. However, there are cases where the tumor cannot be completely removed. In such cases, debulking surgery may be applied to minimize the bulk. Moreover, removal of metastases which are low in number improves the patient's chances of a sound recovery.