All patients will be anaesthetized with spinal technique. Each patient will be treated with
intravenous morphine - patient controlled analgesia (PCA). 2 of 3 groups of patients will
receive ultrasound-guided transversus abdominis plane or quadratus lumborum block to treat
postoperative pain. Postoperative pain will measured with visual-analogue scale (VAS). Total
morphine consumption and time to the first demand will be noted. 1, 2, 6 months after surgery
each patient will be called to assess neuropathic pain with Neuropathic Pain Symptom
Inventory (NPSI).