Di Matteo A, Mankia K, Wakefield RJ, Emery P. Which joints and what pathological findings should be evaluated on ultrasound in CCP+ at-risk individuals? The fifth MTP joint for bone erosions is a good starting point. Response to: ‘Pisotriquetral arthritis: ‘forgotten’ joint in ultrasound imaging of the wrist’ by Becciolini et al. Ann Rheum Dis. 2020 Jun 8;annrheumdis-2020-218036