RT Journal Article SR Electronic T1 Modified Whitaker test: a novel diagnostic for nephroptosis JF BMJ Case Reports JO BMJ Case Reports FD BMJ Publishing Group Ltd SP e235108 DO 10.1136/bcr-2020-235108 VO 13 IS 4 A1 Ralph Grauer A1 Mikel Gray A1 Noah Schenkman YR 2020 UL http://casereports.bmj.com/content/13/4/e235108.abstract AB A 77-year-old woman presented with right flank pain radiating to the ipsilateral groin and associated nausea, consistent with renal colic. In the emergency department, a non-contrast CT scan revealed severe right-sided hydronephrosis but failed to demonstrate a calculus or ureteropelvic obstruction. The patient improved with fluids and followed up with a community urologist. Initial work-up with cystoscopy and ureteroscopy, voiding cystourethrogram and diuretic renography failed to deduce a diagnosis. At our hospital, we used a modified dynamic (supine and upright) Whitaker test in a novel fashion to diagnose nephroptosis, a rare hypermobility condition of the kidney.