title: The abortive calix: variations in appearance and differential diagnosis.
mesh_terms: D003937:Diagnosis, Differential; D006801:Humans; D007670:Kidney Calices / Q000002:abnormalities* / Q000000981:diagnostic imaging; D007680:Kidney Neoplasms / Q000000981:diagnostic imaging; D007682:Kidney Pelvis / Q000002:abnormalities*; D011859:Radiography; D014398:Tuberculosis, Renal / Q000000981:diagnostic imaging