What is false concerning renal oncocytoma?
the central scar on CT or MRI, and the spoke-wheel pattern of vessels on angiograms are not specific to oncocytoma
calcification, necrosis, and hemorrhage are rare in oncocytomas
it is thought to arise from the basement membrane of proximal convoluted tubules
treatment is partial nephrectomy or tumor excision
Correct Answer :
C. it is thought to arise from the basement membrane of proximal convoluted tubules
is thought to arise from the intercalated cells of collecting ducts.
Related Questions
What is the most powerful single predictor of oncologic outcomes in RCC cases?
margin status and grade
tumor size
tumor stage
the time interval between the tumor emergence and excision
Which RCC subtype is most likely to benefit from targeted molecular therapy?
clear cell
chromophobe
papillary
renal medullary
What is the treatment of a 3-cm renal mass suggestive of RCC adjacent to a huge renal cyst?
cyst aspiration and sclerosis
partial nephrectomy
endoscopic marsupialization and fulguration of the cyst
administration of TKIs
Fuhrmans grading system for renal cell carcinoma relies on:
nuclear size, outline, and nucleoli
cohesiveness and the degree of cellular atypia
chromatin structure and content of the interphase nucleus
multinucleation and mitosis
What type of Bosniak renal cysts accompanies tumor masses in 5% of cases?
I
II
III
IV
d. melanoma
. The second most common RCC subtype is:
collecting duct b. clear cell
papillary
chromophobe
In RCC cases where IVC involvement with tumor thrombi are suspected, venacavography:
is the first and most reliable radiologic examination to study IVC thrombi
is reserved for patients with equivocal MRI or CT findings
is obsolete and has fallen out of use
carries a risk of IVC terrible bleeding that outweighs the diagnostic merits
What is false concerning renal cancers?
papillary subtype of RCC has a tendency to multifocality
chromosome 13 alterations are common in the development of clear cell renal carcinoma
a solid mass on CT that enhances more than 15 HU is suggestive of RCC
bilateral involvement in RCC either synchronously or metachronously occurs in 2% to 4% of patients
The etiology of renal cysts includes all of the following, EXCEPT:
autosomal dominant polycystic kidney disease (ADPKD)
developmental cystic renal disease
inherited cystic renal disease
systemic disease with associated renal cysts
What is false concerning renal angiomyolipoma (AML)?
most lesions ≤ 4 cm are asymptomatic
renal masses with fat content is pathognomonic for AML
renal biopsy from AML carries a high risk of hemorrhage
may coexist with malignant lesions, such as sarcomas and RCCs
d. CT can detect renal vein involvement in 82-95% of cases and vena caval involvement in 95-100% of cases
. In RCC, ipsilateral adrenal metastasis occurs in:
0.3 - 2%
2 - 10%
11 - 18%
What is false regarding multiloculated cystic nephromas?
they follow a benign clinical course
they have a bimodal age distribution
they are more common in men than in women
none of the above
Which of the following is NOT a risk factor for RCC?
type II DM, especially in males
hypertension
obesity, especially in females
cigarette smoking
According to Fuhrmans classification system for nuclear grading in RCC, nuclear size of 20 μg with irregular outline and prominent nucleoli is grade:
1
2
3
4
On ultrasonography, what are the percentages of incidentally discovered renal masses that will later be malignant on further workup?
70 - 85%
55 - 70%
40 - 55%
25 - 40%
What is (are) the risk factor(s) for developing simple renal cysts?
male gender
hypertension
renal insufficiency
all of the above
What is (are) true regarding the etiology of medullary cystic kidney disease (MCKD)?
mutations in the MCKD1 (chromosome 1q21) gene
mutations in the MCKD2 (chromosome 16q12) gene
inherited in an autosomal dominant fashion
all of the above
What can NOT be a manifestation of a renal tumor?
right hydrocele
left varicocele
painless hematuria
hypertension
What type of renal adenomas is a precursor to papillary RCC?
adenoma with clear cell
papillary adenoma
metanephric adenoma
none of the above
Which of the following conditions carries the best prognosis?
acquired cystic renal disease
juvenile nephronophthisis
medullary sponge kidney
bilateral multicystic dysplastic kidney
Regarding simple renal cysts, fluid attenuation on non-contrast CT series is:
< - 10 HU
< - 20 HU
< 10 HU
< 20 HU
In renal mass(es), the main indication to take a renal biopsy is the suspicion of:
papillary RCC
renal metastases
renal oncocytoma
renal xanthogranuloma
Which of the following renal tumors carries the best prognosis?
fibrosarcoma
leiomyosarcoma
carcinoid
adult Wilm`s tumor
Routine metastatic evaluation in RCC cases should include all of the following, EXCEPT:
abdominal CT
chest X-ray
renal function test
liver function test
Antenatal sonography is the diagnostic tool for the following condition:
glomerulocystic kidney disease
developmental cystic renal disease
Juvenile nephronophthisis
medullary cystic kidney disease
CT shows a renal mass with calcifications associated with fat. What could the lesion be?
RCC
AML
teratoma
any of the above
d. prior to kidney transplant
. What is an indication for radical nephrectomy?
a 6-cm, polar tumor
bilateral RCC
locally advanced RCC
The likelihood of malignancy in category IIF (indeterminate) renal cysts is:
20%
30%
40%
50%
After radical nephrectomy, what is the 5-year survival rate for stage I RCC?
80%
85%
90%
95%
What is true regarding renal angiomyolipoma (AML)?
most classic AMLs eventually undergo malignant transformation to sarcomatoid and epithelioid AML
the preferred treatment is nephroureterectomy followed by active surveillance
angiographic embolization and/or nephron-sparing surgery is advised for symptomatic AMLs greater than 4 cm
extra-renal sites include the pancreas, salivary glands, and thyroids