CT Papillary Necrosis
CT urogram in the coronal plane using bone windows shows evidence of papillary necrosis in 2 right upper pole calyces characterized by ?golf ball on a tee? sign. This sign is also called the ?lobster claw? sign
Ashley Davidoff MD TheCommonVein.net 135424c

CT Papillary Necrosis
40-year-old female with SLE and NSAID use presents with hematuria. CT with contrast in the axial plane during the excretory shows evidence of a filling defect in a contrast filled right renal calyx, resulting in a ?lobster claw? appearance of the calyx characteristic of papillary necrosis
Ashley Davidoff MD TheCommonVein.net 113597c