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Kidney Dysplasia

Definition of Renal Dysplasia

Kidney dysplasia is a congenital malformation of the kidney. The disturbed metanephric development leads to primitive structure elements (immature or primitive glomeruli and tubuli...), often accompanied by hypoplasia. The risk for renal failure depends on the severity of (bilateral) kidney dysplasia. Kidney dysplasia can be categorized depending on the comorbidities and etiology:

• Renal dysplasia: segmental, unilateral or bilateral
• Renal dysplasia with normal ureteral orifice (with or without obstruction)
• Renal dysplasia with abnormal ureteral orifice (lateral or caudal ectopia)
• Renal dysplasia with urethral (subvesical) obstruction
• Renal dysplasia in Prune-belly syndrome

Etiology of Kidney Dysplasia

• impaired ureteric budding
• fetal or postpartal obstruction of the urinary tract

Pathology of Renal Dysplasia

Pathologic signs of renal dysplasia are primitive tubules, lined by epithelium and surrounded by concentric rings of smooth muscle cells and connective tissue. Often, cartilage is found in the specimen of kidney dysplasia.

References

  Deutsche Version: Nierendysplasie