Renal agenesis classification

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1] Associate Editor(s)-in-Chief: Shakiba Hassanzadeh, MD[2]

Overview

Renal agenesis may be classified as unilateral renal agenesis (URA) or bilateral renal agenesis (BRA). URA is the congenital absence of one kidney and BRA is the congenital absence of both kidneys which is incompatible with life. Renal agenesis may be isolated or associated with other anomalies and syndromes.

Classification

Renal agenesis may be unilateral or bilateral:[1]

  • Unilateral renal agenesis (URA)
    • Congenital absence of one kidney[2][3]
    • The contra-lateral solitary kidney usually functions normally and may become hypertrophied[4]
  • Bilateral renal agenesis (BRA)

Renal agenesis may be isolated or associated with other anomalies and syndromes.[6][7]  

References

  1. 1.0 1.1 Dias T, Sairam S, Kumarasiri S (2014). "Ultrasound diagnosis of fetal renal abnormalities". Best Pract Res Clin Obstet Gynaecol. 28 (3): 403–15. doi:10.1016/j.bpobgyn.2014.01.009. PMID 24524801.
  2. Robson WL, Leung AK, Rogers RC (1995). "Unilateral renal agenesis". Adv Pediatr. 42: 575–92. PMID 8540439.
  3. Woolf AS, Hillman KA (2007). "Unilateral renal agenesis and the congenital solitary functioning kidney: developmental, genetic and clinical perspectives". BJU Int. 99 (1): 17–21. doi:10.1111/j.1464-410X.2006.06504.x. PMID 16956352.
  4. Cho JY, Moon MH, Lee YH, Kim KW, Kim SH (2009). "Measurement of compensatory hyperplasia of the contralateral kidney: usefulness for differential diagnosis of fetal unilateral empty renal fossa". Ultrasound Obstet Gynecol. 34 (5): 515–20. doi:10.1002/uog.7336. PMID 19852048.
  5. Huber C, Shazly SA, Blumenfeld YJ, Jelin E, Ruano R (2019). "Update on the Prenatal Diagnosis and Outcomes of Fetal Bilateral Renal Agenesis". Obstet Gynecol Surv. 74 (5): 298–302. doi:10.1097/OGX.0000000000000670. PMID 31098643.
  6. Laurichesse Delmas H, Kohler M, Doray B, Lémery D, Francannet C, Quistrebert J; et al. (2017). "Congenital unilateral renal agenesis: Prevalence, prenatal diagnosis, associated anomalies. Data from two birth-defect registries". Birth Defects Res. 109 (15): 1204–1211. doi:10.1002/bdr2.1065. PMID 28722320.
  7. Westland R, Schreuder MF, Ket JC, van Wijk JA (2013). "Unilateral renal agenesis: a systematic review on associated anomalies and renal injury". Nephrol Dial Transplant. 28 (7): 1844–55. doi:10.1093/ndt/gft012. PMID 23449343.

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