Sirs,We have read the article written by Yuan et al[1] with great interest. We want to congratulate the authors for their study, which will be a valuable contribution to the scientific literature and patient care. Although Monteggia fractures are seen infrequently, we are aware of their importance primarily due to the high risk of missed diagnosis and their disabling results. This article is precious due to the quite high number of cases of such a rare paediatric orthopaedic condition. However, we noticed a distal radio-ulnar joint disruption in Figures 1, 3 and 5, which had not been mentioned as a complication or a limitation in the manuscript.Proximal ulnar osteotomy, lengthening and grafting if needed, together with a transient transcapitellar radial fixation has been recommended in the literature regarding chronic Monteggia fractures.[2-4] Previous articles also suggest that external fixator use for fixation of the ulnar osteotomy has the advantage of more lengthening and less need for graft.[2] From this point of view, it is noticed from the radiographs in the paper[1] that ulnae were not lengthened. Moreover, the ulnae seem to be relatively shortened due to isolated angulation at the osteotomy site. This relative shortening of the ulna is probably the reason for those distal radio-ulnar disruptions seen in postoperative radiographs of the cases.In conclusion, we would recommend the authors to revise the cases, surgical technique description or the technique itself.Yours faithfully,The Authors