Abnormal ascent of developing kidneys with both kidneys on same side of fetus
Upper kidney is in normal position (normotopic)
Lower kidney ascended on same side (ectopic) and is located by lower pole
90% fused, 10% remain unfused
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
Cao Y et al: Crossed-fused renal ectopia with renal calculi: two case reports and a review of the literature. Medicine (Baltimore). 98(48):e18165, 2019
Choi T et al: Lump type crossed fused renal ectopia with bilateral vesicoureteral reflux: a case report. World J Clin Cases. 7(6):773-7, 2019
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
Bhatt K et al: Crossed fused renal ectopia. J Urol. 191(2):475-6, 2014
Yin Z et al: A new subtype of crossed fused ectopia of the kidneys. Urology. 84(6):e27, 2014
Solanki S et al: Crossed fused renal ectopia: challenges in diagnosis and management. J Indian Assoc Pediatr Surg. 18(1):7-10, 2013
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
Becker AM: Postnatal evaluation of infants with an abnormal antenatal renal sonogram. Curr Opin Pediatr. 21(2):207-13, 2009
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
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
Hörmann M et al: Fetal MRI of the urinary system. Eur J Radiol. 57(2):303-11, 2006
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
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KEY FACTS
Terminology
Imaging
Top Differential Diagnoses
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Diagnostic Checklist
TERMINOLOGY
Definitions
Abnormal ascent of developing kidneys with both kidneys on same side of fetus
Upper kidney is in normal position (normotopic)
Lower kidney ascended on same side (ectopic) and is located by lower pole
90% fused, 10% remain unfused
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
Cao Y et al: Crossed-fused renal ectopia with renal calculi: two case reports and a review of the literature. Medicine (Baltimore). 98(48):e18165, 2019
Choi T et al: Lump type crossed fused renal ectopia with bilateral vesicoureteral reflux: a case report. World J Clin Cases. 7(6):773-7, 2019
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
Bhatt K et al: Crossed fused renal ectopia. J Urol. 191(2):475-6, 2014
Yin Z et al: A new subtype of crossed fused ectopia of the kidneys. Urology. 84(6):e27, 2014
Solanki S et al: Crossed fused renal ectopia: challenges in diagnosis and management. J Indian Assoc Pediatr Surg. 18(1):7-10, 2013
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
Becker AM: Postnatal evaluation of infants with an abnormal antenatal renal sonogram. Curr Opin Pediatr. 21(2):207-13, 2009
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
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
Hörmann M et al: Fetal MRI of the urinary system. Eur J Radiol. 57(2):303-11, 2006
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
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