title: Recurrent flank pain from 'lobster claw'.
authors.affiliation: Section of Nephrology, Department of Medicine, Yale University School of Medicine, New Haven, CT, USA.
authors.forename: Swathi
authors.initials: S
authors.lastname: Singanamala
authors.affiliation: Department of Radiology, Yale University School of Medicine, New Haven, CT, USA.
authors.forename: Saravan
authors.initials: S
authors.lastname: Krishnamoorthy
authors.affiliation: Section of Nephrology, Department of Medicine, Yale University School of Medicine, New Haven, CT, USA.
authors.forename: Mark A
authors.initials: MA
authors.lastname: Perazella
authors.affiliation: Section of Nephrology, Department of Medicine, Yale University School of Medicine, New Haven, CT, USA.
authors.forename: Neera K
authors.initials: NK
authors.lastname: Dahl
keywords: computed tomographic urogram (CTU); papillary necrosis; sickle cell