R. Blanco et al studied this novel ultrasound-guided regional anesthetic technique to provide analgesia following surgery on the thoracic wall in four volunteers. All volunteers reported an effective block that provided long-lasting paresthesia (750-840 min). There were no side-effects noted in this initial descriptive study. They have suggested to confirm these preliminary results in a large clinical trial.[12] Currently only a single major clinical trial comparing the effectiveness of SPB and PVB for Breast Cancer Resections is being conducted by Ghada M N Bashandy, National Cancer Institute, Egypt. [13]