TY - JOUR T1 - Modified Whitaker test: a novel diagnostic for nephroptosis JF - BMJ Case Reports JO - BMJ Case Reports DO - 10.1136/bcr-2020-235108 VL - 13 IS - 4 SP - e235108 AU - Ralph Grauer AU - Mikel Gray AU - Noah Schenkman Y1 - 2020/04/01 UR - http://casereports.bmj.com/content/13/4/e235108.abstract N2 - 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. ER -