Bupivacaine Plus Diclofenac Versus Bupivacaine Alone for Postoperative Pain Relief in Gynecologic Cancer Patients

Inclusion Criteria: * gynecologic cancer patients ,i.e. cervical cancer, endometrial cancer, or ovarian tumor suspicious for malignancy * who has scheduled for operation via laparotomy route * Women who has ASA physical status I-II * All of the have age more than 20 years old * able to communicate in Thai * Women who agrees to participate in this study Exclusion Criteria: * patient who had emergency conditions - indication for emergency operation * intraoperative cardiac arrhythmia * operation purpose for only tumor biopsy * Women who have abnormal kidney function test (Cr \> 1.5) * Women with history of gastrointestinal bleeding * Women who take the antiplatelet or anticoagulant medications * Women with history of allergy to bupivacaine and NSAIDs * Women who cannot evaluated pain score