 Quadratus lumborum block QLB is an abdominal plane block with increasing popularity. QLB is achieved by local anesthetic infiltration at the anterolateral aspect of quadratus lumborum muscle QLB-I, or at the posterior aspect of the muscle QLB-II, or transmuscular QL-TM block. Ultrasound-guided technique is the usual route used for QLB performance. QLB had been considered a modification of transversus abdominis plane TAP block4. A cadaveric study had showed similar local anesthetic spread in both QL and TAP blocks. 