Combined Subcostal and Lateral Transversus Abdominis Plane Block for Postoperative Analgesia Versus Thoracic Epidural Analgesia in Patients Undergoing Major Abdominal Cancer Surgery

Inclusion Criteria: * Age ≥ 18 years. * Both sexes. * American Society of Anesthesiologists (ASA) physical status I-III. * Scheduled for major abdominal surgeries including: (e.g., gastrectomy, colectomy, hepatectomy, cystectomy, total abdominal hysterectomy, Nephrectomy, pancreatectomy). Exclusion Criteria: * Intraoperative hemodynamic instability. * History or evidence of coagulopathy. * Infection or abdominal wall masses at injection site. * Morbid obesity. * Other Medical conditions including mental illness or substance abuse. * Known allergy to local anesthetics. * Chronic opioid use or chronic pain conditions. * Pregnancy.