RT Journal Article SR Electronic T1 Large bladder calculus masking a stone in single-system ureterocele JF BMJ Case Reports FD BMJ Publishing Group Ltd SP bcr-2017-219418 DO 10.1136/bcr-2017-219418 VO 2017 A1 Ved Bhaskar A1 Rahul Janak Sinha A1 Bimalesh Purkait A1 Vishwajeet Singh YR 2017 UL http://casereports.bmj.com/content/2017/bcr-2017-219418.abstract AB Ureterocele in an elderly is a rare entity. The presence of stone within ureterocele along with a large bladder calculus is an even rarer presentation. This phenomenon has not been reported so far to the best of our knowledge. We present an unusual case of a large bladder calculus with a concomitant stone in the associated ureterocele. The diagnosis was missed in the first instance due to the masking effect by the larger bladder calculus. Herein, we discuss this case and its management.