Witwer - GUT Anatomy and Radiology Flashcards
retroperitoneal structures
Suprarenal (adrenal)
Aorta/IVC
Duodenum (2nd/3rd parts)
Pancreas (excluding tail)
Ureters
Colon (ascending/descending)
Kidneys
Esophagus
Rectum
shape of adrenal glands
inverted Y/lambda
location of the bladder
pelvic cavity
posterior to pubis symphysis
below parietal peritoneum
intraperitoneal
location of ureters
begin at ureteropelvic junction (UPJ) of kidney
posterior to renal vein and artery in the hilum
retroperitoneal
location of the kidneys
either side of spine
supine - T12-L3 vertebrae
ribs 11/12 - L¾
retroperitoneal
abdominal cavity
the __ kidney is lower
when erect, the kidneys are slightly __
right
lower
structures related to the right side of the kidney
descending duodenum
posterior liver
hepatic flexure of colon
structures related to the left kidney
stomach
spleen
pancreas
splenic flexure
structure medial to the kidneys
psoas m
course of the ureter
along medial aspect of psoas → anterior/medial to L2/L5 transverse process → enters pelvis at sacroiliac joint at bifurcation of common iliac vessels → runs anteriorly to internal iliac to lateral pelvic sidewall
3 constrictions of the ureter
pelviureteric junction (PUJ)
common iliac artery bifurcation
vesicoureteric junction (VUJ)
constrictions of the ureter are the mc sites of
renal calculus
fxn of the psoas
flexion of hip
fxn of iliopsoas
flexion and external rotation of hip
innervation of psoas major
L1-L3
note the renal fascia, perinephric (perirenal) fat, psoas m, IVC/aorta
not the cortex and medulla
location of renal arteries
L1-L2
significance of aortic aneurysms on kidneys
can involve renal arteries
consequence of blockage of renal arteries
htn
renal pain is referred to cutaneous areas supplied by __,
including __ (5)
T12 - L2
posterior/lateral abdominal wall below ribs
above iliac crest
scrotum
labia majora
proximal anterior thigh
the gonadal arteries arise from the
aorta
a short urethra predisposes pt to
cystitis
the filling of the bladder is under __ control
sympathetic
during filling of the bladder, the detrusor m is
relaxed
the emptying of the bladder is under __ control
parasympathetic
during filling of the bladder, the __ are contracted (2)
internal sphincter
external sphincter
contraction of the internal sphincter is under __ control
sympathetic
contraction of the external sphincter is under __ control
voluntary
during emptying of the bladder, the detrusor m is
contracted
during emptying of the bladder, relaxation of the internal sphincter is under __ control
and relaxation of the external sphincter is under __ control
parasympathetic
voluntary
what n roots innervate sympathetic control of the bladder
L1-L3
what n roots control parasympathetic control of the bladder
S2-S4
what binds the trigone of the bladder (2)
ureteral orifices
internal urethral sphincter
2 populations affected by adrenal hemorrhage
adults
newborn
in newborns, adrenal hemorrhage is 2/2 to (2)
and results in __
anoxia (no O2), sepsis
adrenal insufficiency
benign adrenal adenomas are a type of
incidentaloma → benign, no clinical significance
pheochromocytomas arise from the __,
secrete __,
and cause __
adrenal medulla
catecholamines
htn
pheochromocytomas arising outside of adrenal medulla are called
paragangliomas
ex of a paraganglioma
glomus tumor of the jugular foramen
primary hyperaldosteronism is same same
conn syndrome
conn syndrome can be 2/2 to (2)
cortical hyperplasia
tumor
sx of conn syndrome (3)
fatigue
high bp
hypokalemia
2 treatable causes of htn
pheochromocytoma
conn syndrome
metastases to adrenal gland are common from common tumors, including (4)
melanoma
lung
colon
breast
is primary adrenal carcinoma common
no!
2 consequences of VUR
renal scarring
renal infxn (pyelonephritis)
how does VUR cause pyelonephritis
infected urine is refluxed
causes of VUR in peds (4)
immature short ureteral tunnel
congenital anomaly at UVJ
posterior urethral valves
neurogenic bladder
what cause of VUR resolves w. age
immature short ureteral tunnel
what cause of VUR is only in males
posterior urethral valves
imaging for hydronephrosis
US
hydronephrosis requires __
full work up
40% of peds < 5 yo w. UTI have
VUR
VUR and UTI both require what kind of care
aggressive individual evaluation/tx
close long term f.u
risk for significant renal damage
work up for VUR
VCUG or isotope cystogram
radionuclide DMSA renogram
2 components of bladder fxn, filling, emptying/voiding/micturition
neurologic
muscular
what controls conscious interpretation of full or empty bladder
cerebral cortex
what monitors filling and coordinates voiding of bladder
pontine micturition center
spinal cord pathways for bladder (2)
ANS
somatic
what nerve inhibits detrusor contraction and contracts the internal urethral sphincter in the urethra and bladder neck during filling
hypogastric n
hypogastric n arises from
T10-T12
what n controls detrusor contraction and relaxation of the internal urethral sphincter and bladder neck during bladder emptying
pelvic n
pelvic n arises from
S2-S4
what n controls contraction of the external sphincter in the urogenital diaphragm during bladder filling/relaxation during voiding
pudendal n
pudendal n innervation of the bladder is under __ control
voluntary
what nerve pathways does the sacral micturition center include
PSNS
somatic
PSNS component of sacral micturition center (2)
detrusor contraction
internal sphincter relaxation
somatic component of sacral micturition center
pudendal n relaxation → coordination of micturition
interference/damage to any of the centers and/or pathways controlling storage of urine and micturition
neurogenic/neuropathic bladder
neurogenic bladder can be __
or __
complete
incomplete
what do these symptoms make you think: involuntary bladder contractions (detrussor hyperreflexia) with coordinated sphincter relaxation, sudden strong urge to urinate
neurogenic bladder lesion above the brain stem
what is coordinated bladder sphincter relaxation
urge incontinence
what do these symptoms make you think of: detrusor hyperreflexia, uncoordinated spastic external sphincter (detrusor-sphincter dyssenergy), residual urine w. reduced bladder capacity
complete lesion of the spinal cord above T12 vertebral body
what do these symptoms make you think of: detrusor areflexia, loss of sense of fullness, weak unsustained contractions, incomplete bladder emptying w. large amounts of residual volume
lesion to the spinal micturition reflex
lesion to the spinal micturition reflex is a __ motor lesion
with loss of __
and __
lower
motor and sensory
pt education for neurogenic bladder
shock phase may last weeks-months → may have no sensation/areflexia
summary of neurogenic bladder
what to know: concept of UMN and LMN and their relation to the reflex arc
where can kidney stones be located
in kidney → mc renal medulla
renal collecting system → calyces, infundibula, renal pelvis, ureter
what is this showing
stone in left renal pelvis
what is this showing
stone in the renal pelvis
when do patients commonly pass stones
when they are dehydrated
where is renal stone pain felt (5)
back
flank
groin
labia
scrotum
mc differential dx for painful hematuria
kidney stone
mc cause of painless hematuria
bladder ca
best imaging to evaluate for stone/stone ddx
non contrast spiral CT
how does hydronephrosis appear on imaging
enlarged collecting system → can be confused for cysts
what causes renal papillary necrosis (5)
analgesic abuse (acetaminophen)
pyelonephritis
renal ichemia
DM (sorry tess, but not you bc you are so good at managing yours)
sickle cell dz
in renal papillary necvrosis, the __ sloughs off and causes
__
medulla
filling defects
2 forms of nephrocalcinosis
cortical
medullary
causes of cortical nephrocalcinosis (5)
acute cortical necrosis
chronic glomerulonephritis
prolonged hypercalcemia
hypercalciuria
poisoning/toxicities
causes of medullary nephrocalcinosis (6)
hyperparathyroidism
medullary sponge kidney
renal tubular acidosis
renal papillary necrosis
milk-alkali syndrome
hyperoxaluria
all causes of nephrocalcinosis are related to (4)
hypercalcemia
renal damage from ischemia
inflammation
toxins
what is this showing
nephrocalcinosis
congenital condition involving dilated renal tubules; generally asymptomatic
medullary sponge kidney
medullary sponge kidney predisposes infant to (2)
infxn
stone formation
relatively common autosomal dominant condition involving multiple cysts → massive non-functioning kidneys → renal failure later in 40s and 50s
adult polycystic kidney dz
what is this showing
polycystic kidney dz w. cysts in liver and pancreas
are renal cysts always pathologic
no! they can be common/normal incidental findings with age
usually single or several
rare (usually) incidental finding where lower poles of kidney are fused across abd midline
horseshoe kidney
horseshoe kidney predisposes pt to (2)
obstructions
stones
renal condition that is a potentially treatable cause of HTN
renal artery stenosis
renal stenosis activates the __
RAAS
2 forms of renal artery stenosis
atherosclerotic
fibromuscular dysplasia (hyperplasia)
tx for atherosclerotic renal artery stenosis
- meds
- balloon angioplasty or surgical correction
tx for fibromuscular renal artery stenosis
balloon angioplasty
what happens to kidney size in renal artery stenosis
it shrinks → loss of fxn
renal artery stenosis is really only curable if it is diagnosed
early
how do you evaluate bruit in renal artery stenosis
put stethoscope to the right and left of transpyloric plane
condition that mc affects women in 40 and 50s that involves fibrous thickening of all layers of renal artery wall
fibromuscular dysplasia
tx for htn caused by fibromuscular dysplasia
balloon angioplasty
4 potentially treatable forms of HTN
pheochromocytoma
conn tumor/hyperplasia
renal artery stenosis 2/2 arteriosclerosis
renal artery stenosis 2/2 fibromuscular dysplasia
condition mc found in dehydrated pt’s or infants w. clotting abnormalities that can cause nephrotic syndrome and pulmonary blood clots
renal vein thrombosis
what is this showing
atherosclerotic renal artery stenosis
mc cause of cystitis (UTI)
e.coli
predisposing factors for UTI/cystitis (2)
sex :(
catheterization
what do you think when you see a kid w. recurrent cystitis
underlying abnormality →
neurogenic bladder
ureteral issues
VUR
developmental abnormalities of ureter
renal damage
painless hematuria
bladder ca til proven otherwise
also
renal cell carcinoma
there better be a gd test question on this!
imaging for renal cell carcinoma (3)
CT
IVP
US
symptom of renal cell carcinoma
painless hematuria
all painless hematuria must be evaluated for urinary tract malignancy
sx of transitional cell carcinoma
painless hematuria!
where are transitional cell carcinoma tumors found (4)
ureters
bladder
urethra
kidney
what do you think when you see US or MRI showing asymetry in prostate gland
carcinoma of the prostate
where does prostate carcinoma metastasize
bones
possible sx of prostate carcinoma
bone pain
elevated alk phos
where do the testicles form embryologically
beneath kidneys → descend thru inguinal canal → into scrotum
“hidden testicles”
cryptochordism
potential complications of cryptochoridism
infertility
malignancy
majority of cryptochordism resolves w.in
first year of life
imaging for epidydymitis
US
common US findings of eididymitis
enlarged heterogenous, hyper-vascular w. reactive hydrocele
can hydroceles in the absence of epididymitis be a benign finding
yes! common in kids and adults
painful condition involving spermatic cord twisting
testicular torsion
what is a bell clapper deformity and why do we care about it
testicle not attached to scrotum → tunica vaginalis surrounds much of the testicle
predisposes to testicular torsion
in terms of tx, what is testicular torsion
medical emergency → twisted (torted) testicle is avascular
imaging for testicular torsion
US doppler flow
ddx for painful testicle/scrotum (6)
epididymitis
orchitis
epididymitis/orchitis combo
testicular torsion
varicocele
hernia w.in scrotum
symptoms of epididymitis/orchitis combo
increased blood flow →
rubor, calor, tumor, dolor → redness, heat, swelling, pain
imaging if pt complains of testicular/scrotal pain
US
testicular malignancies are associated w. __ cells
germ → sperm progenitors
imaging to visualize mass in scrotum
US
venous drainage of testes is via the __,
which runs with the __
pampiniform plexus
spermatic cord
a varicocele is a varicosity of the
pampiniform plexus
US findings of varicocele
multiple veins w. slow blood supply
enlarged ovaries w. thick sclerotic capsules and an abnormally high number of follicles
poly cystic ovary dz
stein-leventhal syndrome
obesity
ammenorrhea
infertility
hirsutism
PCOD
when you see stein-leventhal syndrome, think
PCOD
what is this showing
blue ovary → ovarian torsion
imaging to evaluate ovarian torsion
doppler US → shows blood flow to ovary
what do you think when you see a pt w. extensive abscesses in tubes and ovaries (tuboovarian abscess)
long standing, untreated pelvic inflammatory dz
CT/US findings of PID
fluid collections
PID involves inflammation of the __ (3)
uterus
tubes
ovaries
benign ovarian tumor
serous cystadenoma
malignant ovarian tumor
carcinoma of the ovary → large, solid
condition in which the uterine tissue is outside of the uterus in the adnexa or bowel
endometriosis
benign tumor of the uterus
leomyomata/fibroids
leomyomata is mc in __
and can lead to __
older pt
infertility
condition similar to endometriosis involving endometrial tissue w.in myometrium
uterine adenomyosis
symptoms of uterine adenomyosis
same as endometriosis:
painful menstrual cramps
uterine bleeding
dyspareunia
infertility
what is dyspareunia
painful intercourse
painful post menopausal bleeding is __ until proven otherwise
endometrial carcinoma
rf for endometrial carcinoma
obesity
DM
breast ca
tamoxifen
nulliparity
increasing age
high estrogen levels
genetics
PCOS
70% of cervical carcinoma can be prevented by
HPV vaccine
what is parametrial invasion
invasion of tumor behind the uterus, which obstructs ureters
cervical carcinoma that leads to masses that involve the bladder anteriorly and the rectum posteriorly → creates a shelf of tumor
frozen pelvis
PE exam for frozen pelvis
DRE → can feel large pelvic masses