kidney misc Flashcards
medullary nephrocalcinosis
bosniak classifcation?
2F
- septa calcs
- size > 3cm
bosniak classification?
bosniak I
no septa, very simple
what bosniak classification do you follow?
bosniak 2F
which bosniak classifications do you excise?
3 and 4
diabetic
emphysematous pyelonephritis
is this mass enhancing?
yes!
new finding. Management?
excise it
trauma grade
IV
Next step?
Take it out!!
masses with 3 or more septa are NOT multisepated but they are multiLOCULATED
two most common multilocated masses in an adult?
multilocular cystic nephroma and multilocular RCC
you cannot tell the difference between the two on imaging
history of schistosomiasis
schistosomiasis
fever and leukocytosis
pyelonephritis with right renal vein thrombus
XGP with staghorn calc
UPJ crossing vessel
retroperitoneal liposarcoma
10–15% of all liposarcomas arise from the retroperitoneum
retroperitoneal fibrosis
50F
Mixed epithelial and stromal tumor (MEST)
you see a hyperdense cyst on NON-contrast CT and think it is likely a benign hemorrhagic cyst. At what HU can you safely call it a hemorrhagic cyst?
> 70 HU
you see a hyperdense cyst on contrast-ENHANCED CT and think it is likely a benign hemorrhagic cyst. At what HU can you safely call it a hemorrhagic cyst?
trick question!
a hyperdense cyst cannot be diagnosed if only post contrast imaging is available as there is no way to distinguish a hyperdense cyst from an enhancing mass
treatment for pyonephrosis
emergent PCN
when do you put a drain in a renal abscess
when > 3cm
sign to distinguish a ureteral stone from a phlebolith?
soft tissue rim sign.
the presence of a small amount of soft tissue surrounding the calcificaiton suggests a ureteral stone rather than a vascular calcificaton
papillary carcinoma
demonstrates diffuse weak enhancement - difficult to see on standard post conrast images but best demonstrated on subtraction
duplicated collecting system. two ureteral jets
oncocytoma or RCC?
oncocytoma
RCC is cold on PET, oncocytom is flaming hot
