LETTER TO THE EDITOR Investigating the Effects of Pulsed Radiofrequency on Dorsal Root Ganglion in Chronic Lumbar Radicular Pain Patients: Is It Not Important

It is interesting to read the paper by Koh et al. on the investigation of the pulsed radiofrequency (PRF) of the dorsal root ganglion (DRG) in patients of chronic lumbosacral radicular (CLR) pain [1]. It is noteworthy that the authors attempted to perform a controlled trial on a challenging topic. However, I am afraid that the study design, results, and conclusions have further “muddied the water” instead of bringing clarity to the existing evidence on the efficacy of PRF-DRG in CLR pain patients. I would like to highlight some aspects of the study, which decrease the confidence in their study results and conclusions.