Urinary Tract Flashcards
What is the renal cortex?
outer renal parenchyma
(normal is > 1 cm)
E 79
What is the renal medullary?
inner portion of kidney from base of pyramids to center of kidney
E 79
What is the renal sinus?
inner hyperechoic portion of kidney
E 79
What are the medullary pyramids?
anechoic triangles of collecting tubules between cortex and renal sinus
E 79
What is the renal pelvis?
funnel-shaped transition from major calyces to the ureter
E 79
What is the renal hilum?
medial opening for entry/exit of artery, vein, and ureter
E 79
What are the major calyces?
3 extensions for the renal pelvis
E 79
What are the minor calyces?
extensions of the major calyces that collect urine from medullary pyramids
E 79
What is the renal papilla?
apex of medullary pyramids
E 79
What is Gerota’s fascia?
fibrous sheath enclosing kidney and adrenal glands
also called perirenal space
E 79
What is a nephron?
functional unit of a kidney
E 79
Through which arteries is the kidney supplied with blood?
Main renal Segmental Interlobar Arcuate Interlobular E 80
What complications can be seen with congenital abnormalities of the kidneys?
impaired renal function
infection
calculus formation
E 81
Where is the most common ectopic kidney located?
pelvis
E 81
What is a horseshoe kidney?
1 large U-shaped kidney lying in the lower abdomen
E 81
What is a dromedary hump?
common variant of cortical thickening on the lateral aspect of the kidney
E 82
What is a junctional parenchymal defect?
triangular hyperechoic area on the anterior aspect of the upper pole of the right kidney
E 82
What is a duplex kidney?
duplicated collecting systems
appears as a central cortical break w/in the sinus
either complete - 2 ureters or incomplete - 1 ureter
E 83
What is a column of Bertin?
normal variation of prominent renal cortical parenchyma located between 2 medullary pyramids
E 83
Is someone able to live with renal agenesis?
not bilateral, but unilateral agenesis does not necessarily affect your life
E 83
What associations can be seen with unilateral renal agenesis?
VACTERL Vertebral defects Anal atresia Cardiovascular anomalies TE tracheoesophageal fistula Renal anomalies Limb defects E 83
What is an extrarenal pelvis?
renal pelvis lying outside the renal sinus
appears as a cystic collection at the hilum
E 84
What is posterior urethral valve?
urinary obstruction in male neonates
sonographically: large bladder, hydroureter, hydronephrosis, “key-hole bladder”
E 84
Where is a parapelvic cyst located?
cortical cyst bulging into the central sinus
E 85
Where is a peripelvic cyst located?
within the central sinus
E 85
Where is a parenchymal cyst located?
around the periphery
E 85
What are atypical/malignant characteristics of renal cysts?
multiple septations
calcifications
solid components
E 86
What are the characteristics of autosomal dominant (adult) polycystic kidney disease?
seen as early as 20-30 years of age bilateral renal enlargement numerous cysts associated cysts within liver, pancreas, and spleen E 86
What is concerning about autosomal dominant adult polycystic kidney disease?
destruction of residual renal tissue can lead to renal failure and HTN
E 86
What are the sonographic characteristics of autosomal recessive infantile polycystic kidney disease?
bilateral renal enlargement
hyperechoic parenchyma
loss of cortical medullary distinction
E 87
What is concerning about autosomal recessive infantile polycystic kidney disease?
renal dysfunction pulmonary hypoplasia congenital hepatic fibrosis portal hypertension E 87
What is the most common cause of an abdominal mass in newborns?
multicystic dysplastic kidney
E 88
What is multicystic dysplastic kidney (MCDK)?
renal dysplasia characterized by multiple noncommunicating cysts with the absence of renal parenchyma
typically unilateral
E 88
What is MCDK caused by?
results from atresia of the UPJ during fetal development
E 88
Will MCDK change after the fetus is born?
It can stay the same
increase in size
or undergo spontaneous involution (shrink)
E 88
What syndromes is MCDK seen with?
Beckwith-Wiedemann
Trisomy 18
VACTERL
E 88
What is a ureteropelvic junction obstruction caused by?
ureteral hypoplasia
high insertion of ureter into renal pelvis
compression by segmental artery
E 88
What anomalies are associated with UPJ obstruction?
MCDK contralateral renal agenesis duplicated collecting systems horseshoe kidney ectopic kidney E 88
What are the sonographic characteristics of medullary sponge kidney?
hyperechoic medullary pyramids
E 89