Charousset C, Lefebvre Y, Bonnevialle N, et al. - This study was attempted to assess the prevalence of metal hypersensitivity reported by patients with shoulder pathologies, and to distinguish patients at risk of joint metal hypersensitivity based on a dedicated questionnaire. Between september 2018 and February 2019, researchers prospectively asked all adult patients consulting for shoulder pathologies at 10 centers to fill in a form. The main endpoint included “reported hypersensitivity to metals,” comprising belt buckles, coins, earrings, fancy jewelry, keys, leather, metallic buttons, piercings, spectacles, watch bracelets, or zips. The study population consisted of 3,217 patients who agreed to fill in the survey, aged 55 ± 16 (range, 18-101) with equal proportions of men (51%) and women (49%), and a majority of patients consulting for cuff pathology (55%). They found metal hypersensitivities in 20% of patients, though only 2.2% had done patch tests. The outcomes noted that matching profiles of those with positive patch tests to those with no patch tests exhibited that 9.4% of the total cohort had similar gender and self-reported metal hypersensitivities. Factors correlated with a positive patch test were female gender, self-reported cutaneous allergy, and self-reported metal hypersensitivity. The clinical applicability of these calculates remains uncertain as there is insufficient data that allergy to metal implants can be prognosticated by questionnaires or patch tests.