title: Normal renal papillae simulating caliceal filling defects on sonography.
mesh_terms: D000293:Adolescent; D000328:Adult; D005260:Female; D006801:Humans; D006869:Hydronephrosis / Q000175:diagnosis; D007670:Kidney Calices / Q000033:anatomy & histology*; D007679:Kidney Medulla / Q000033:anatomy & histology*; D007682:Kidney Pelvis / Q000033:anatomy & histology*; D008297:Male; D011247:Pregnancy; D014463:Ultrasonography