title: Ureterocele and pseudoureterocele: cobra versus cancer.
abstract: The cobra-shaped distal ureter is not pathognomonic of a ureterocele. It may be seen with incomplete distal ureteral obstruction owing to tumor or calculus. The appearance of the wall surrounding the dilated distal ureteral segment is a more important finding to differentiate a ureterocele and a pseudoureterocele. The wall of a ureterocele is thin, while the lucency surrounding a pseudoureterocele is thicker and poorly defined.
mesh_terms: D003937:Diagnosis, Differential; D006801:Humans; D011859:Radiography; D014516:Ureteral Neoplasms / Q000000981:diagnostic imaging*; D014518:Ureterocele / Q000000981:diagnostic imaging*