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Crossed Fused Ectopia
Karen Y. Oh, MD
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KEY FACTS

  • Terminology

    • Imaging

      • Top Differential Diagnoses

        • Pathology

          • Clinical Issues

            • Diagnostic Checklist

              TERMINOLOGY

              • Synonyms

                • Ectopic kidney
                • Cross-fused ectopic kidney
              • Definitions

                • Abnormal fusion of developing kidneys
                • Both kidneys on same side of fetus

              IMAGING

              • General Features

                • Ultrasonographic Findings

                  • MR Findings

                    • Imaging Recommendations

                      DIFFERENTIAL DIAGNOSIS

                        PATHOLOGY

                        • General Features

                          CLINICAL ISSUES

                          • Presentation

                            • Demographics

                              • Natural History & Prognosis

                                • Treatment

                                  DIAGNOSTIC CHECKLIST

                                  • Image Interpretation Pearls

                                    Selected References

                                    1. Bhatt K et al: Crossed fused renal ectopia. J Urol. 191(2):475-6, 2014
                                    2. Yin Z et al: A new subtype of crossed fused ectopia of the kidneys. Urology. 84(6):e27, 2014
                                    3. Solanki S et al: Crossed fused renal ectopia: Challenges in diagnosis and management. J Indian Assoc Pediatr Surg. 18(1):7-10, 2013
                                    4. 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
                                    5. Becker AM: Postnatal evaluation of infants with an abnormal antenatal renal sonogram. Curr Opin Pediatr. 21(2):207-13, 2009
                                    6. Glodny B et al: Kidney fusion anomalies revisited: clinical and radiological analysis of 209 cases of crossed fused ectopia and horseshoe kidney. BJU Int. 103(2):224-35, 2009
                                    7. Barseghyan K et al: Complementary roles of sonography and magnetic resonance imaging in the assessment of fetal urinary tract anomalies. J Ultrasound Med. 27(11):1563-9, 2008
                                    8. Hörmann M et al: Fetal MRI of the urinary system. Eur J Radiol. 57(2):303-11, 2006
                                    9. Nursal GN et al: Unfused renal ectopia: a rare form of congenital renal anomaly. Ann Nucl Med. 19(6):507-10, 2005
                                    10. Cassart M et al: Complementary role of MRI after sonography in assessing bilateral urinary tract anomalies in the fetus. AJR Am J Roentgenol. 182(3):689-95, 2004
                                    11. Stimac G et al: Tumors in kidney fusion anomalies--report of five cases and review of the literature. Scand J Urol Nephrol. 38(6):485-9, 2004
                                    12. Yuksel A et al: Sonographic findings of fetuses with an empty renal fossa and normal amniotic fluid volume. Fetal Diagn Ther. 19(6):525-32, 2004
                                    13. Muttarak M et al: Clinics in diagnostic imaging (59). Crossed-fused renal ectopia. Singapore Med J. 42(3):139-41, 2001
                                    14. Dillon E et al: A 10 year audit of antenatal ultrasound detection of renal disease. Br J Radiol. 71(845):497-500, 1998
                                    15. James CA et al: Antenatally detected urinary tract abnormalities: changing incidence and management. Eur J Pediatr. 157(6):508-11, 1998
                                    16. Seeds JW: Borderline genitourinary tract abnormalities. Semin Ultrasound CT MR. 19(4):347-54, 1998
                                    17. DeVore GR: The value of color Doppler sonography in the diagnosis of renal agenesis. J Ultrasound Med. 14(6):443-9, 1995
                                    18. Rubinstein ZJ et al: Crossed renal ectopia: angiographic findings in six cases. AJR Am J Roentgenol. 126(5):1035-8, 1976
                                    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

                                              • Diagnostic Checklist

                                                TERMINOLOGY

                                                • Synonyms

                                                  • Ectopic kidney
                                                  • Cross-fused ectopic kidney
                                                • Definitions

                                                  • Abnormal fusion of developing kidneys
                                                  • Both kidneys on same side of fetus

                                                IMAGING

                                                • General Features

                                                  • Ultrasonographic Findings

                                                    • MR Findings

                                                      • Imaging Recommendations

                                                        DIFFERENTIAL DIAGNOSIS

                                                          PATHOLOGY

                                                          • General Features

                                                            CLINICAL ISSUES

                                                            • Presentation

                                                              • Demographics

                                                                • Natural History & Prognosis

                                                                  • Treatment

                                                                    DIAGNOSTIC CHECKLIST

                                                                    • Image Interpretation Pearls

                                                                      Selected References

                                                                      1. Bhatt K et al: Crossed fused renal ectopia. J Urol. 191(2):475-6, 2014
                                                                      2. Yin Z et al: A new subtype of crossed fused ectopia of the kidneys. Urology. 84(6):e27, 2014
                                                                      3. Solanki S et al: Crossed fused renal ectopia: Challenges in diagnosis and management. J Indian Assoc Pediatr Surg. 18(1):7-10, 2013
                                                                      4. 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
                                                                      5. Becker AM: Postnatal evaluation of infants with an abnormal antenatal renal sonogram. Curr Opin Pediatr. 21(2):207-13, 2009
                                                                      6. Glodny B et al: Kidney fusion anomalies revisited: clinical and radiological analysis of 209 cases of crossed fused ectopia and horseshoe kidney. BJU Int. 103(2):224-35, 2009
                                                                      7. Barseghyan K et al: Complementary roles of sonography and magnetic resonance imaging in the assessment of fetal urinary tract anomalies. J Ultrasound Med. 27(11):1563-9, 2008
                                                                      8. Hörmann M et al: Fetal MRI of the urinary system. Eur J Radiol. 57(2):303-11, 2006
                                                                      9. Nursal GN et al: Unfused renal ectopia: a rare form of congenital renal anomaly. Ann Nucl Med. 19(6):507-10, 2005
                                                                      10. Cassart M et al: Complementary role of MRI after sonography in assessing bilateral urinary tract anomalies in the fetus. AJR Am J Roentgenol. 182(3):689-95, 2004
                                                                      11. Stimac G et al: Tumors in kidney fusion anomalies--report of five cases and review of the literature. Scand J Urol Nephrol. 38(6):485-9, 2004
                                                                      12. Yuksel A et al: Sonographic findings of fetuses with an empty renal fossa and normal amniotic fluid volume. Fetal Diagn Ther. 19(6):525-32, 2004
                                                                      13. Muttarak M et al: Clinics in diagnostic imaging (59). Crossed-fused renal ectopia. Singapore Med J. 42(3):139-41, 2001
                                                                      14. Dillon E et al: A 10 year audit of antenatal ultrasound detection of renal disease. Br J Radiol. 71(845):497-500, 1998
                                                                      15. James CA et al: Antenatally detected urinary tract abnormalities: changing incidence and management. Eur J Pediatr. 157(6):508-11, 1998
                                                                      16. Seeds JW: Borderline genitourinary tract abnormalities. Semin Ultrasound CT MR. 19(4):347-54, 1998
                                                                      17. DeVore GR: The value of color Doppler sonography in the diagnosis of renal agenesis. J Ultrasound Med. 14(6):443-9, 1995
                                                                      18. Rubinstein ZJ et al: Crossed renal ectopia: angiographic findings in six cases. AJR Am J Roentgenol. 126(5):1035-8, 1976