Congenital mesoblastic nephroma (CMN)


  • Rare low-grade fibroblastic neoplasm of infancy arising in the renal sinus

Clinical features


  • Two to four percent of pediatric renal tumors

  • Ninety percent occur in the first year of life.

  • Nearly all reported cases within less than 30 months of age

  • Most common renal tumor diagnosed prenatally

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