Describe three common developmental abnormalities of the kidneys
What will be an ideal response?
Renal agenesis: failure of one or both kidneys to develop; bilateral agenesis is uncommon
Duplications of the urinary tract: formation of extra ureters and renal pelves secondary to the abnormal prenatal development of ureteric buds; may unilateral or bilateral; when there is an extra renal pelvis present, it is known as a complete duplication. Partial duplication is union of both ureters to form a single ureter that enters the bladder.
Abnormalities of position and fusion: kidneys either remain in the pelvis or ascend part way; most common fusion is the union of the lower poles of the two kidneys to form a U-shaped mass of renal tissue or a horseshoe-shaped kidney
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