Comparison of Robotic Surgery and Open Surgery for Gallbladder Cancer

INTERVENTION: Intervention1: NIL: NIL Control Intervention1: NIL: NIL CONDITION: Health Condition 1: C23‐ Malignant neoplasm of gallbladder PRIMARY OUTCOME: Lymph node yield ; ; Timepoint: Day 0 at day of surgery ; ; ; SECONDARY OUTCOME: 1, 3 and 5year DFS ; 1, 3 and 5‐year OS ; Timepoint: At 1, 3 and 5 year followups 90‐day mortality rate ; Timepoint: at 90 day followup Blood loss ; Timepoint: Day 0 End of the operation Conversion rate to open ; Timepoint: Day 0 During operation Intra‐operative complications ; Post‐operative complications ; Timepoint: Day 0 During the operation and at the end of the operation Length of ICU and hospital stay ; Timepoint: At the time of discharge Operative timeTimepoint: Day 0 End of the Operation R0 resection rate ; Timepoint: Day 7 After surgery and final histopathology report Short‐term and long‐term Quality of life at 3 months 1 year and 3 years assessed by Functional Assessment of Cancer Therapy Hepatobiliary questionnaire.Timepoint: 3months, 1 year and 3 years INCLUSION CRITERIA: 1. Age above 18 years 2. ASA class I‐III 3. ECOG performance status 0 to 2 4. Radiologically suspected, biopsy confirmed resectable gall bladder cancer or histopathologically confirmed gall bladder cancer post laparoscopic cholecystectomy deemed suitable for revision cholecystectomy with or without neoadjuvant chemotherapy.