Papillary necrosis and medullary sponge kidney in a patient with hemoglobin SC.

A 22-year-old woman with hemoglobin SC who was hematologically asymptomatic, developed gross hematuria associated with urinary tract infection, without any urological antecedents. Investigations revealed a unilateral hematuria due to papillary necrosis on the left kidney. Medullary sponge kidney was also discovered by radiologic investigations. Papillary cysts could play a role in the occurrence of papillary necrosis.