Fetal Kidneys Flashcards
when do the kidneys begin to develop
7 weeks
when does the bladder start to form
8 weeks
when do the kidneys ascend to renal fascia
10 weeks
urinary fully bladder develops when
12 weeks
when does genitalia fully form
14 weeks
when are the kidneys visual
by 20 weeks
does does urine production begin
11 weeks
what vessels are lateral to the bladder
internal iliac arteries
horse shore kidneys
kidneys attached at the lower pole
unilateral kidney agenesis
no oligo
bladder is visualized
kidney enlarged
when can bilateral renal agenesis be diagnosed
16 weeks
bilateral renal agenesis is more common in males or females
males
most severe GU anomaly
bilateral renal agensis
sono characteristics of bilateral renal agenesis
non vis. of bladder or kidneys
dolichocephalic head
small thorax
oligo between 16 to 28 weeks
pyelectasis dilation between 15 and 20 weeks
> 4 mm
pyelectasis dilation between 20 to 30 weeks
> 8 mm
pyelectasis dilation after 30 weeks
> 10mm
dilatation w/ obstruction
UPJ
UVJ
PUV
UPJ
most common
contralateral kid. functions normal
dilated renal pelvis
UVJ obstruction
usually duplication anomaly of ectopic ureterocele
dilated upper pole of kidney
PUV
most common bladder outlet obstruction
more common in males
membranous fold in posterior urethra
PUV sono findings
bladder wall thickening
BL dilation
hydro
oligo
MCDK
most common incidental finding
enlarged kidneys
contralateral usually abnormal
MCDK sono findings
lobulated reniform shape
multiple cyst
increased echogenicity
cryptorchidism
undescended testes
prune belly syndrome
deficient abd musculature
cryptorchidism
gu anomaly
prune belly on sono
oligo
hydro
ascites
pulmonary hypoplasia
dilated ureters & bladders
ARPKD
loss of cortico medullary junction
multiple cyst, enlarged kidneys, decreased renal function
ARPKD on sono
echogenic kidneys
enlarged kidneys
decrease amniotic fluid
ADPKD
enlarged kidneys and hyperechoic
fluid normal or reduced
when is ADPKD seen
3rd tri
causes of cytic masses in fetal abdomen
fetal ovarian cyst
related to hormones
uncommon
hard to differentiate
fetal hydrocele
when can adrenal glands be seen
9.5 weeks
adrenal hemorrhage