Tehran University of Medical Sciences Frontiers in Emergency Medicine 2717-3593 4 3 2020 02 29 e66 e66 Lukas Verweij Department of Orthopedic Surgery, Amsterdam University Medical Centers, University of Amsterdam, Amsterdam Movement Sciences (AMS), Academic Center for Evidence-Based Sports Medicine (ACES), Amsterdam, The Netherlands Henk-Jan van der Woude Department of Radiology, Onze Lieve Vrouwe Gasthuis, Amsterdam, The Netherlands Michel van den Bekerom Department of Orthopedic Surgery, Onze Lieve Vrouwe Gasthuis, Amsterdam, The Netherlands 2020 02 20 2020 02 25 Dear editor: A shoulder dislocation is a common diagnosis at the emergency department, showing an incidence of 23.9 per 100,000 person-years. In the current diagnostic work-up, a radiograph is often used to confirm the dislocation. As radiographs are associated with radiation exposure, the ultrasound has been proposed as an alternative. Therefore, the study by Entezari et al is of great importance in evaluating the applicability of the ultrasound. However, the authors suggest that the ultrasound can be used as an alternative to the radiograph. In our opinion, an important advantage of the radiograph has not been discussed and we question some decisions that were made in terms of methodology. Therefore, we think that this study has to be seen in the light of these remarks. https://fem.tums.ac.ir/index.php/fem/article/view/346 https://fem.tums.ac.ir/index.php/fem/article/download/346/268