FETAL URINARY TRACT

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Last updated 10:33 PM on 8/17/26
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13 Terms

1
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kidneys ascend into adult position by

11 weeks

2
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potter syndrome

  • pulmonary hypoplasia

  • oligohydraminos

  • twisted skin (wrinkly)

  • twisted face

  • extremity defects

  • renal agenesis (bilateral)


3
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bilateral renal agenesis

  • no visualization of fetal kidneys

  • no visualization of fetal bladder

  • after 16 weeks, severe oligohydraminos

  • lying down adrenal sign

  • absent renal arteries


4
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unilateral renal agenesis

  • normal fluid

  • normal visualization of bladder


5
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m/c form of renal ectopia

pelvic kidney

6
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multicystic dysplastic kidney

kidney tissue is replaced by multiple cysts of varying size and no normal renal tissue

<p>kidney tissue is replaced by multiple cysts of varying size and no normal renal tissue </p>
7
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obstructuve cystic renal dysplasia

  • small echogenic kidney with one or several cysts

  • evidence of urinary obstruction


8
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infantile autosomal recessive polycystic kidney disease

  • both kidneys symmetrically enlarged

  • cysts are too small

  • renal function severely impaired

    • oligo, bladder may not be seen


<ul><li><p>both kidneys symmetrically enlarged </p></li><li><p>cysts are too small </p></li><li><p>renal function severely impaired</p><ul><li><p>oligo, bladder may not be seen</p></li></ul></li></ul><p></p>
9
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hydronephrosis

measurement of renal pelvic diameter

  • if RPD > 5mm at 18-23 weeks

  • if RPD > 7mm in 3rd trimester


<p>measurement of renal pelvic diameter </p><ul><li><p>if RPD &gt; 5mm at 18-23 weeks </p></li><li><p>if RPD &gt; 7mm in 3rd trimester</p></li></ul><p></p>
10
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m/c cause of neonatal hydronephrosis

UPJ obstruction

11
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posterior urethral valve

m/c cause of bladder outlet obstruction in males

  • keyhole sign


12
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prune belly syndrome

eagle-barrett syndrome

  • absent anterior abdominal musculature

  • undescended testes

  • urinary tract abnormalities


13
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when do kidneys frist start to produce urine

11 weeks