“…We read with great interest the study by Fujii et al [1] comparing the ability of a PECS-2 vs. a serratus plane block to prevent chronic pain after simple mastectomy with or without axillary dissection. Conversely, an additional injection at the level of the 3rd rib provides axillary coverage in more than two thirds of cases [4]. Therefore, we would be interested if the authors could elaborate on the level at which they performed their serratus plane blocks, and what proportion of patients who had surgery involving lymph node dissection in each of their study groups were afflicted by chronic pain.…”