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Ultrasound
Diagnosis
Urinary Tract
Normal Variants and Pseudolesions
Renal Ectopia
Renal Ectopia
Jane S. Kim, MD
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KEY FACTS

  • Terminology

    • Imaging

      • Top Differential Diagnoses

        • Pathology

          • Clinical Issues

            TERMINOLOGY

            • Abbreviations

              • Renal ectopia (RE), crossed fused ectopia (CFE)

            • Definitions

              • Aberrant location of kidney
              • Simple RE and CFE represent most common forms
                • Other rare variants: Crossed nonfused, solitary crossed, and bilateral crossed RE

            IMAGING

            • General Features

              • Ultrasonographic Findings

                • Nuclear Medicine Findings

                  • CT Findings

                    • MR Findings

                      DIFFERENTIAL DIAGNOSIS

                        PATHOLOGY

                        • General Features

                          CLINICAL ISSUES

                          • Presentation

                            • Demographics

                              • Natural History & Prognosis

                                • Treatment

                                  DIAGNOSTIC CHECKLIST

                                  • Image Interpretation Pearls

                                    Selected References

                                    1. Loganathan AK et al: Crossed fused renal ectopia in children: a review of clinical profile, surgical challenges, and outcome. J Pediatr Urol. 15(4):315-21, 2019
                                    2. Solanki S et al: Crossed fused renal ectopia: challenges in diagnosis and management. J Indian Assoc Pediatr Surg. 18(1):7-10, 2013
                                    3. Chang PL et al: Prenatal diagnosis of cross-fused renal ectopia: does color Doppler and 3-dimensional sonography help? J Ultrasound Med. 30(4):578-80, 2011
                                    4. Siegel MJ: Pediatric Sonography. 4th edition. Lippincott Williams & Wilkins, 2011
                                    5. Singer A et al: Spectrum of congenital renal anomalies presenting in adulthood. Clin Imaging. 32(3):183-91, 2008
                                    6. Guarino N et al: The incidence of associated urological abnormalities in children with renal ectopia. J Urol. 172(4 Pt 2):1757-9; discussion 1759, 2004
                                    7. Goodman JD et al: Crossed fused renal ectopia: sonographic diagnosis. Urol Radiol. 8(1):13-6, 1986
                                    8. McCarthy S et al: Ultrasonography in crossed renal ectopia. J Ultrasound Med. 3(3):107-12, 1984
                                    Related Anatomy
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                                    Related Differential Diagnoses
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                                    References
                                    Tables

                                    Tables

                                    KEY FACTS

                                    • Terminology

                                      • Imaging

                                        • Top Differential Diagnoses

                                          • Pathology

                                            • Clinical Issues

                                              TERMINOLOGY

                                              • Abbreviations

                                                • Renal ectopia (RE), crossed fused ectopia (CFE)

                                              • Definitions

                                                • Aberrant location of kidney
                                                • Simple RE and CFE represent most common forms
                                                  • Other rare variants: Crossed nonfused, solitary crossed, and bilateral crossed RE

                                              IMAGING

                                              • General Features

                                                • Ultrasonographic Findings

                                                  • Nuclear Medicine Findings

                                                    • CT Findings

                                                      • MR Findings

                                                        DIFFERENTIAL DIAGNOSIS

                                                          PATHOLOGY

                                                          • General Features

                                                            CLINICAL ISSUES

                                                            • Presentation

                                                              • Demographics

                                                                • Natural History & Prognosis

                                                                  • Treatment

                                                                    DIAGNOSTIC CHECKLIST

                                                                    • Image Interpretation Pearls

                                                                      Selected References

                                                                      1. Loganathan AK et al: Crossed fused renal ectopia in children: a review of clinical profile, surgical challenges, and outcome. J Pediatr Urol. 15(4):315-21, 2019
                                                                      2. Solanki S et al: Crossed fused renal ectopia: challenges in diagnosis and management. J Indian Assoc Pediatr Surg. 18(1):7-10, 2013
                                                                      3. Chang PL et al: Prenatal diagnosis of cross-fused renal ectopia: does color Doppler and 3-dimensional sonography help? J Ultrasound Med. 30(4):578-80, 2011
                                                                      4. Siegel MJ: Pediatric Sonography. 4th edition. Lippincott Williams & Wilkins, 2011
                                                                      5. Singer A et al: Spectrum of congenital renal anomalies presenting in adulthood. Clin Imaging. 32(3):183-91, 2008
                                                                      6. Guarino N et al: The incidence of associated urological abnormalities in children with renal ectopia. J Urol. 172(4 Pt 2):1757-9; discussion 1759, 2004
                                                                      7. Goodman JD et al: Crossed fused renal ectopia: sonographic diagnosis. Urol Radiol. 8(1):13-6, 1986
                                                                      8. McCarthy S et al: Ultrasonography in crossed renal ectopia. J Ultrasound Med. 3(3):107-12, 1984