Calcific rotator cuff tendonitis is a pain in the arm. 465 pts studies by ultrasound. Often acute middle aged women and 1/3 withno degenerative cuff on U/S. rarely rupture, <10% need surgery. Most Rx was IA steroids THU0504 #EULAR2019 @RheumNow https://t.co/LiM07v3J1p