11/02/2024
AKI in cancer patient
>>>introduction
-1yr risk 17.5%(AKI, ESRD)
-Critically ill incidence54%
-kidney->most common extrareticular site leukemic&lymphoma infiltration
-renal infiltration30%(autopsy60%)
-แต่ทำให้เกิดAKI แค่1%(leukemia),tubular compression +disrupt microcirculation-->
> Flank pain, hematuria, hypertension, AKI, or aymptomatic
>>>Risk
-sepsis
-direct injury from primary cancer
-metabolic disturbance
-nephrotoxic(CMT,anticancer)
-TLS
-female, age>65
-u/d: ckd, DM, volume depletion
-renal hypoperfusion: cardiomyopathy, cirrhosis, nephrotic syndrome
>>>AKI in hematologic cancer
💙Cancer-related injury
-tumor infiltration
-retroperitoneal LN compress
-lysozymuria/lysozyme ass. nephropathy(rare, มักunderregconized)
(CMML, AML(mono) สร้าง lysozyme ในกระแสเลือด--> flow in urine--> reabsorb at proximal tubule--> toxic tubular injury
-HLH with acute interstitial disease
-vascular occlusive, DIC
-hypercalcemia with nephrocalcinosis
-Glomerular disease (MCD, MPGN, amyloidosis, immunotactoid GN, fibrillar GN, Rare; crescentric GN, FSGS, MN)
🩵Therapy-related injury
-Nephrotoxicity(TMA, ATN, TIN, GN)
-TLS with acute uric nephropathy
💜Others
-sepsis
-volume depletion
-contrast media
-NSAIDs, ACEIs/ARBs, ATB
>>>AKI in MM
-20-50%
-Nephrotoxic overproduction monoclonal Ig/FLC
1.most common: cast nephropathy
2.LCs related proximal tubular injury
3.Glomerulopathies
3.1 light chain deposition
3.2 AL amyloidosis
3 3 others
4.metabolic disturbance: hypercalcemia, hyperuricemia
5.sepsis/drugs
>>>Approach
1.urine albumin>2 -->glomerulopathy
2.if ≤2 -->cast nephropathy, proximal tubulopathy
>>Cast nephropathy
-LCs bind with THP-->insoluble casts-->obstruct lumen+local inflammation
Dx: high SFLC, UFLC ,nephelometric immunoassay(quantitative FLC)
Tx: adequate hydration, correct hyperCa, CMT
-VAD > Vin AD
-VTD,VMD 72%renal response rate(57% discontinueHD)
-others: VRD, pomalidomide, carfilzomib
(velcadeไม่ต้องลดdose)
Goal: decrease FLC with in3wk-->improve renal outcome
-Additional therapy(not recomment: therapeutic plasma exchange, large pore hemofilter(high cut -off hemodialysis)
-Transplantation: in dialysis pt.-->excellent hematologic outcome but low renal response
>>LCs related proximal tubulopathy
-endocytosis LCs-->ATN+Fibrosis-->Fanconi 's syndrome +/-AKI
(Proximal RTA+glucosuria+phosphaturia+proteinuria+aminoaciduria)
>>Glomerulopathy
-proteinuria
-albuminuria
>>>TLS
-Common in high tumor burden ex Burkitt's, ALL
-electrolyte imbalance: inc.KUP/ dec.Ca
-AKI
-arrhythmias
-seizure
-uric acid nephropathy: insoluble uric->micro-obstruction+vasoconstriction->ischemia+inflammatory cytokines
-nephrocalcinosis: calcium phosphate precipitation
(การalkalinized urine ทำให้uricละลายดีขึ้น แต่ calcium phosphate precipitationมากขึ้น***)
Mx
-hydration NSS
-prophylaxis xanthine oxidase: allopurinol/febuxostat
-if uric สูงก่อน start CMT: recommend rasburicase(recombinant urate oxidase)
(Convert uric acid to more soluble allantoin แต่ทำให้เพิ่มH2O2-->methemoglobin
>>>hypercalcemia of malignancy
-30%advanced cancer(mcc:scc lung >adenoCA,hematologicCA)
-activate Ca sensing receptor(thick ascending loop of henle-->inhibit Na-K cotransport-->natriuresis+volume depletion
-Ca induced renal vasoconstriction
-nephrogenic DI
-nephrocalcinosis
Tx:
-aggressive IV hydrarion 200-250ml/hr
-loop diuretic(little benefit ต้องมั่นใจว่าvolumeพอ, ควรให้ในพวกhypervolumia)
-ถ้าไตวายหนักๆอาจต้อง HD with low Ca dialysate
-medication: bisphosphonate, calcitonin
-humanized monoclonal Ab: denozumab-->
neutralize receptor activator of NF-KBligand-->reduce osteoblast activity
>>>HSCT&AKI
-5%require dialysis
>>risk:
-sepsis
-volume depletion
-nephrotoxic drugs: aminoglycoside,acyclovir, amphotericinB(direct nephrotoxicity&TIN), calcineurin inhibitor(TMA)
-GVHD(pre-renal) -VOD(hepatorenal+portalHT)
-infection:Adeno/BK/CMV (TIN,GN)