HYU Onc - Kidney Flashcards
Renal Mass Staging: T1a, T1b
T1a: < or = 4 cm
T1b: < or = 7 cm
Renal Mass Staging: T2a, T2b
T2a: < or = 10 cm
T2b: >10 cm
Renal Mass Staging: T3a
T3a: renal vein, pelvicalyceal, perirenal/renal sinus fat within Gerota
Renal Mass Staging: T3b
IVC below diaphragm
Renal Mass Staging: T3c
VC above diaphragm
Renal Mass Staging: T4
Outside of Gerota or involving adrenal
Stage I
T1N0M0
Stage II
T2N0M0
Stage III
T3N0-1M0
T1-2N1M0
Stage IV
M1
Postoperative Risk Stratification
Low Risk: pT1 and Grade 1-2
Intermediate Risk: pT1 and Grade 3-4, or pT2 and any G
High Risk: pT3 and any G
Very High Risk: pT4 or pN1, sarcomatoid, rhabdoid, macroscopic R1
*Note, positive final margin should increase risk category by one level and increase clinical vigilance
Evaluation of renal mass:
- Imaging?
- Labs?
- CKD?
Get multi-phase cross sectional imaging (enhancing = greater that 20 HU)
Consider MRI if suspicion for IVC thrombus
Get CT chest for advanced tumors
If malignancy suspected –> CBC, UA, CMP, chest imaging
Solid or Bosniak 3/4 mass: Use GFR to assign CKD stage I-V
- (90+, 60+, 30+, 15+, <15 or Dialysis)
When to consult nephrology?
Consider for eGFR <45, expected postop GFR <30, proteinuria, DM with CKD
When to consult Med Onc?
Concerned for potential clinical mets
Incomplete resection
Consider adjuvant treatment for High Risk (T3 and G) or locally advanced, fully resected cancers
When to consult genetics?
Recommend for age 46 or less, multifocal/bilateral renal masses, whenever the personal/family history suggests a familial renal neoplastic syndrome
When to perform Renal Mass Biopsy (RMB)?
Consider if suspicious for hematologic/metastatic/inflammatory/infectious mass
For solid mass, multiple cores»_space; FNA
PPV ~100%, NPV ~60%, Nondiagnostic ~15%
Partial Nephrectomy:
- When do you prioritize this?
- When do you consider it?
- Surgical considerations?
Prioritize PNx: cT1a (when Tx is indicated), cases with solitary kidney, bilateral tumors, familial RCC, multifocal, severe CKD
Consider PNx: young patients, multifocal masses, increased risk for future CKD (HTN, DM, urolithiasis, morbid obesity)
Surgical considerations: minimize warm ischemia time, prioritize negative margins, consider enucleation if familial RCC, multifocal or severe CKD
When is radical nephrectomy preferred over partial nephrectomy?
Radical only preferred over partial if:
1. High tumor complexity and pNx would be difficult even in experienced hands
2. No preexisting CKD or proteinuria
3. Normal contralateral kidney and new baseline GFR likely to be >45
Consider radical when oncologic potential is suggested by tumor size, RMB, and/or imaging characteristics
When is Thermal Ablation appropriate? How to follow up?
Consider for cT1a <3cm AFTER renal mass biopsy
Radio and cryo are options
Counsel slightly worse outcomes (i.e. local recurrence rates)
Can repeat ablation as needed
Obtain pre and post contrast abdominal imaging within 6 months of ablation, then follow IR postop protocol
When to consider active surveillance? Triggers for intervention?
Consider especially for <2cm, repeat imaging in 3-6 months
Consider RMB for mass with solid component
Individualize surveillance based on growth rate and shared decision making (SDM)
Potential triggers for intervention in healthier patients?
- Growth to >3cm
- >5mm/year of growth
Follow-up labs post-op?
Cr, UA, eGFR –> refer to nephrology PRN
Consider other labs as needed and if advanced disease expected (CBC, LDH, LFTs, Alk Phos, Ca++)
Abdominal imaging after nephrectomy and partial nephrectomy?
Chest imaging?
CT w/ and w/o contrast or MRI for 5 years
Consider switching LR and IR patients to alternating cross sectional imaging and abdominal US
SDM for further imaging after 5 years
LR: yearly for 5 years
IR + TA: 6, 12, 24, 36, 48, 60 (q6m for a year)
HR: 6, 12, 18, 24, 30, 36, 48, 60 (q6m for 3 years)
VHR: 3, 6, 9, 12, 18, 24, 30, 36, 48, 60 (every 3 months for a year, then every 6 months to 3 years, then yearly)
Chest imaging: CXR for LR+IR, CT for HR and VHR
SDM after 5 years
What to do when renal artery vasospasm during hilar dissection?
Reduced perfusion
Pale kidney
- Reduce insufflation pressure
- Apply topical papaverine (opium alkaloid antispasmodic vasodilator) to renal hilar vessels
When to consider when using argon gas laparoscopically?
Argon beam will increase abdominal pressure due to addition of argon gas
- Important to vent abdomen via a port to relieve pressure
Interaortocaval nodes only drain the right kidney
They drain the left kidney with advanced disease
Incidence of local recurrence after nephrectomy?
What does this mean for 5 year survival?
Incidence 2.9%
Poor prognosis: 5 year survival 30%
Synchronous mets at the time of recurrence are an independent predictor of poor prognosis
Hand-assisted lap compared to straight lap?
What does this mean for donor nephrectomies?
Hand-assisted lap has higher rates of wound complications (infections and hernias)
In setting of donor nephrectomy, warm ischemia time of donor kidney is reduced because specimen can be quickly removed via hand-port. Other outcomes are similar to straight lap.
Acute bleed following ligation/division of left renal hilum
Think about disruption of a lumbar vein, because this inserted into the renal vein posteriorly
Workflow for urine leak after partial nephrectomy
Start with perc drain placement if drain not already present
If leak persists, make sure drain isn’t directly on leak site, and take off of suction
Place urethral catheter and do RPG + ureteral stent
If unable to place stent, place PCN
Severe, persistent back pain resistant to pain meds after renal surgery
Consider rhabdomyolysis (if pain contralateral to side of surgery, check CK)
Pancreatic injury (if pain is on left following left-sided renal surgery, check amylase and lipase)
Proposed criteria for cytoreductive nephrectomy
Ability to resect >75% of the tumor
No brain mets (need to be treated with radiation or surgery prior to cNx)
Adequate pulmonary and cardiac reserve
ECOG performance status of 0-1
(0=Fully active, able to carry on all pre-disease performance without restriction
1=Restricted in physically strenuous activity but ambulatory and able to carry out work of a light or sedentary nature, e.g., light house work, office work)
Predominantly clear-cell histology
Disease has not progressed through systemic therapy (sunitinib)
Vaccinations s/p splenectomy
Indicated due to risk of severe infection with encapsulated bacteria
SHiN - Streptococcus pneumoniae, Haemophilus influenzae type b, Neisseria meningitidis
New lesion with early enhancement and prompt washout at prior tumor site after partial nephrectomy
Get US with doppler to determine pseudoaneurysm vs. recurrence
RCC tumor thrombus levels
0 = renal vein
1 = <2cm into IVC
2 = >2cm into IVC but still below hepatic veins
3 = above hepatic veins but below diaphragm
4 = above diaphragm
3 and 4 may need bypass during sugrery
“Persistent central enhancement”
Tumor recurrence after cryoablation
Ways to optimize (lap) renal cryoablation
Real-time intraop US to monitor progression of cryo lesion
Cryoprobe tip at deepest margin of tumor
Target temperature below -40C
Extend the cryo lesion ~1cm beyond the margin of the tumor
Active double freeze-thaw cycle
Small renal mass(es) are identified in conjunction with widespread LAD outside of typical LN drainage zones
Suspect renal involvement of lymphoma
Perc LN biopsy to determine Tx plan
Renal tumor with high signal on T1 on MRI
Fat in lesion
Think AML
Think a/w tuberous sclerosis
AML = benign tumor of perivascular epithelioid cell origin
MRI sequence most likely to confirm AML
T2 with fat suppression
On CT, suspect AML if negative HU (fat) are mentioned
Angioembolization often effective, particularly in setting of acute bleed
If massive, will need nephrectomy
Drug that can be used to shrink AMLs
Everolimus (Afinitor)
Tumor growth typically resumes when treatment is discontinued
Can watch AMLs when small, can cause problems if >4 cm
Benign tumor in 20yo with elevated peripheral renin
Juxtaglomerular tumor
Tumor secretes renin
patients typically <20yo
Cured with surgery
Rare, extremely aggressive tumor associated with sickle cell trait
Renal medullary carcinoma
- Arises from collecting duct
<100 cases ever
Mean survival <6 months
75% on right side
Central/infiltrative, not amenable to partial
Does not typically respond to chemo/immunotherapies
Treatment for metastatic renal medullary carcinoma
Carboplatin + paclitaxel is first line (not upfront surgical resection)
Gemcitabine + adriamycin is 2nd line
Collecting duct RCC
More aggressive –> younger age of presentation
Resistant to standard chemos for RCC, but sometimes responsive to gemcitabine and cisplatin chemos (behave more like UCC)
Renal pseudotumor
Column of Bertin
Focal cortical hyperplasia
Best established with DMSA scan
How to follow patients with oncocytoma or indeterminate histology on renal mass biopsy
Follow with same imaging protocols used for untreated low risk renal cancers due to risk of substantial growth and risk of inaccurate biopsy results
How to distinguish between oncocytoma and RCC?
Technetium-sestamibi nuclear scanning
- oncocytoma will have high radiotracer uptake
- RCC will have low radiotracer uptake
Preferred regimens for relapse or stage IV metastatic CCRCC (favorable and poor/intermediate risk)
Pembrolizumab + axitinib - Keynote-426
Nivolumab + cabozantinib - CheckMate-9ER
Pembrolizumab + lenvatinib - CLEAR
Cabozantinib monotherapy (CABOSUN) is a preferred option for poor/intermediate risk