Pediatric Oncologic Emergencies - UnityPoint · PDF filepediatric oncologic emergencies...
Transcript of Pediatric Oncologic Emergencies - UnityPoint · PDF filepediatric oncologic emergencies...
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Oncologic Emergencies
Nick Fustino, MD Blank Children’s Hospital
Pediatric Hematology-Oncology
Pediatric Nursing Conference November 7, 2014
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Objectives • Discuss pathophysiology and diagnosis of common
pediatric oncologic emergencies – Tumor Lysis Syndrome – Hyperleukocytosis / Leukostasis – Disseminated Intravascular Coagulation (DIC) – Respiratory Emergencies (SVC / SMS) – Spinal Cord Compression – Fever & Neutropenia – Neutropenic Colitis
• Learn to anticipate, prevent, recognize and treat emergencies
• All of these scenarios have occurred at Blank Children’s within the past year
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Pediatric Malignancies
Adapted from: American Cancer Society Cancer Facts & Figures, 2007. Atlanta, American Cancer Society, 2007.
Leukemia, 30%
CNS, 22.3% Other, 17.1%
Neuroblastoma, 7.3%
Wilms, 5.6%
NHL, 4.5% HL, 3.5%
Rhabdo, 3.1% Rb, 2.8% Osteo, 2.4% Ewing’s, 1.4%
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Etiology of Oncologic Emergencies
• Initial presentation of primary disease
• Complication/ progression of known disease
• Complication of therapy
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Why are Oncologic Emergencies Important?
• Need to be addressed before therapy can begin or continue
• Avoid end-organ injury • Avoid compromising long-term QOL
• In complex emergent situations, teamwork
and bedside nursing acumen are critical
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Appearance? Urine output? Pain? A-B-C’s? Wt change? Fevers? Sweats? Pallor? Headache? Neuro change? Gait?
Biopsy?
Really a mass? CBC? How big? For how long? Growing? How fast?
Chemo? Labs?
Resect?
Open Protocol?
Bed on 4?
CT / MRI?
Metastatic?
Consent?
Prognosis? HVA / VMA?
Differential Diagnosis CanCer or not CanCer? Constipation HsM infeCtion all Brain tuMor WilMs lyMpHoMa neuroBlastoMa
Immediate Concerns A-B-C’s
Tumor Lysis Renal Failure
Intracranial Pressure Obstruction
Is the patient safe? Where is he/she?
With whom? What is available? What’s been done?
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ER charge nurse in Ft. Dodge has 6yM with large abd mass. Requests direct admit to floor.
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Oncologic Differential Diagnosis
• Neuroblastoma • Wilm’s Tumor • Rhabdomyosarcoma • Lymphoma • Other rare abdominal tumors (clear cell
sarcoma, MPNST, rhabdoid, etc.)
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Rapidly expanding abdominal mass
Uric Acid: 11 Creatinine: 1.2
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Tumor Lysis Syndrome (TLS)
• Definition: – Metabolic derangements from rapid,
spontaneous, or treatment-related death of tumor cells
– Laboratory or clinical – 3 days prior and up to 7 days after starting tx – Peak risk ~ 24-48 h after start of tx
Howard et al., NEJM, 2011
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TLS - Pathophysiology
Howard et al., NEJM, 2011
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TLS - Complications
• ↑K Cell Lysis
• ↑Uric Acid
DNA Breakdown
• ↑PO4 DNA
Breakdown
• ↓Ca Ca
complexing with PO4
Cytokine release
Renal failure
Fatal dysrhythmias
Renal failure
Tetany, dysrhythmia, renal failure
Multi-organ failure
Howard et al., NEJM, 2011
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TLS - Complications
• Lymphoblasts have 4x the PO4 than lymphocytes
• If Ca x P > 60, CaPO4 crystals can precipitate in renal tubules
Howard et al., NEJM, 2011
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TLS - Risk Factors and Epidemiology • High tumor burden
– High-grade lymphomas (ie. Burkitt’s), acute leukemias (T-cell)
• High turnover – Elevated uric acid/LDH pre-
therapy • Organ infiltration: liver,
spleen • Sensitivity to therapy • Intensity of therapy • Pre-existing renal
impairment
Howard et al., NEJM, 2011 Radiopaedia.com
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TLS - Evaluation and Diagnosis
• ANTICIPATION, Laboratory assessment • Close attention to symptoms of electrolyte
abnormalities – Abdominal pain – Back pain – Vomiting – Cramps – Diarrhea – Dehydration – Muscle spasms – Tetany, seizures
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TLS Management
• Goal: preserve renal function, prevent life-threatening dysrhythmia, avoid hemodialysis
• Hyperhydration: bolus, IVF at 1.5-4X MIVF – Improve renal perfusion, uric acid excretion – Minimizes acidosis – MAINTAIN GOOD URINE OUTPUT
• Goal 2 mL/kg/hr • May need diuretics (loop)
Howard et al., NEJM, 2011
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TLS Management - Hyperuricemia • Hydration • Alkalinization
– Unclear efficacy – Not routinely done anymore – Decreases Ca, P solubility
• Allopurinol – Slower – Risk of xanthine nephropathy
• Rasburicase (0.2 mg/kg) – Fast – Contraindicated in G6PD deficiency – Rash, hemolysis, anaphylaxis,
methemoglobinemia – Stop Bicarb
Howard et al., NEJM, 2011
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TLS Management - Hyperkalemia
Can be fatal Monitoring • Frequent laboratory
assessment • Accurate laboratory
assessment – Repeat if abnormal – False elevation in venous
sample during hyperkeukocytosis; use iSTAT
• EKG/Cardiac Monitor • 7.5 mEq/L may → sinus arrest • 10-12 mEq/L may → cardiac
standstill or V Fib
K+=
Merckmanuals.com
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TLS Management - Hyperkalemia
• Limit K and Phos input (DON’T PUT IN IVF) Treatment Dose Notes
Albuterol 0.5 mg neb
Kayexalate 1g/kg po q6h w/ 50-150 mL sorbitol, slow onset
CaCl2 10-20 mg/kg IV Stabilizes myocardium, Rapid onset, lasts 30 min
Ca Gluconate 100-200 mg/kg IV Stabilizes myocardium
NaHCO3 1-2 mg/kg IV Onset 30 min, last several hours
Glucose + Insulin 0.5g/kg/h + 0.1 unit/kg/h Shifts K+ intracellular, onset 30 min
Hemodialysis
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TLS Management - Hypocalcemia
• Only treat if symptomatic – Fatigue, cramping, tetany, laryngospasm, weakness,
paresthesias, AMS, Seizure, EKG changes (long QTc)
• Control Phos Level – PO4 binders
• CaCl2 – 10 mg/kg IV
• Ca Gluconate – 100 mg/kg IV
Hall and Todd, Postgrad Med J, 2006
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Bedside TLS Monitoring
• Clinical assessment – Hourly intake / output & vital signs
• Laboratory – Na, K, Glu, iCa q4-6 h – BUN, Cr, uric acid, P q4-6 h – CBC / Diff / Plt q6-8 h – Coags, LFTs, Albumin q24 h – Imaging as indicated
• Continue for 2-4 days of initial therapy; gradually reduce
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3yM with big spleen, WBC 390, T97, BP 102/78, HR 115, RR 44. Nml Hgb & plt. Looks good. By car ok? (4hrs)
OSH: 3yM with big spleen, WBC 315K, T97, BP 102/78, HR 115, RR 48. Hgb/plt WNL. To Floor?
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Hyperleukocytosis and Leukostasis
• WBC > 100K • Leukostasis
– Blasts lack deformability – Increased viscosity, WBC
aggregates, thrombi – Blasts are sticky,
Myeloblasts > Lymphoblasts – Can be fatal (greatest risk at
WBC > 300K) • CNS hemorrhage, thrombosis • Pulmonary Leukostasis
babraham.ac.uk
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CNS and Pulmonary Leukostasis
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Leukostasis – Signs and Symptoms
Systemic Tumor Lysis, DIC
CNS AMS, HA, blurred vision, papilledema, dizziness, gait instability, stroke, Sz
CV MI Pulmonary Dyspnea, tachypnea, cyanosis, acidosis, hypoxia Renal RVT, ARF GI Abd pain, bowel infarction Other Priapism, dactylitis
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Leukostasis - Management • A – B – C • IV access • Prevent TLS Hydrate / reduce uric acid • Platelets: keep >20 (prevent hemorrhage) • Hemoglobin: AVOID pRBC transfusion (prevent
hyperviscosity)
• If WBC rises rapidly / does not drop quickly, consider cytoreduction – Steroids – Hydoxyurea – Leukopheresis – Exchange transfusion
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15yF with headache, emesis, LOC at school. WBC 105. ICU doc wants VasCath for leukopheresis.
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APML
Image uaz.edu.mx
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APML PT: 70 INR: 7.8 PTT: >200 Fibrinogen: <60 D-Dimer: > 20
12 105 29
81% Blasts
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DIC
• Microthrombi and bleeding – Platelet and clotting
factor consumption – Microangiopathy – Hyperfibrinolysis
• Etiologies – Gram negative sepsis – Leukemia (AML M3,M5;
ALL with high WBC) – Metastatic solid tumors
Semin Thromb Hemost. 2007 33(4):408-15
www.medscape.com
Sepsis/ Malignancy
Systemic activation of coagulation
Widespread intravascular
fibrin deposition
Consumption of plts, clotting factors
Severe Bleeding
Thrombosis, organ failure
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Hemorrhage is a common cause of early death in pediatric AML
Semin Thromb Hemost. 2007 33(4):408-15
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Hemorrhage: Dominant clinical APML manifestation
• Distinct form of DIC – Severe hyperfibrinolysis, disseminated
microthrombi • Fatality due to hemorrhage
– At presentation or shortly after start of Tx – Almost always intracranial or pulmonary – Historical incidence: 20-30% – Current incidence: ~10% with fatal coagulopathy – Coagulopathy can last months (hyper/hypo)
Tallman et al. Semin Thromb Hemost. 2007 33(4):330-8
Wang. Blood 2008 111(5) 2505-15
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Zuckerman et al., Blood, 2012 Tallman et al. Semin Thromb Hemost. 2007
Wang et al., Blood. 2008
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DIC - Management • Anticipation, frequent lab/clinical monitoring • Replace consumed factors
– Platelets: Transfuse to keep > 50K initially – Fibrinogen: FFP or Cryo to keep > 150 mg/dL – Can consider ATIII, APC in severe cases – No routine use of heparin or antifibrinolytics
• Treat underlying cause – AML: Start chemo – APML: start ATRA as soon as suspected – Sepsis: antibiotics
• No leukopheresis – Need for anticoagulation – Large-caliber vascular access – Hypocalcemia, hypothermia, anemia, thrombocytopenia – Equipment/expertise availability
Zuckerman et al., Blood, 2012
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12yM w/pallor, bruising, WBC 190. Hgb 10, plt 42. BM Bx & aspirate on floor w/ sedation?
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18yF w/big neck LN. Mild cough, HA. Very Anxious. Resident to order Ativan for CT scan.
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Chee et al., Nature Clinical Practice Cardiovascular Medicine, 2007
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Mediastinal Mass – Malignant Differential Diagnosis
• Lymphoma (NHL, Hodgkin’s) • T-Cell Leukemia • Germ cell tumor • Rhabdomyosarcoma, neuroblastoma, thyroid
tumors, parathyroid tumors • Thymoma
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Pathophysiology – SVCS/SMS
• Superior Vena Cava Sx – Compression, obstruction
of SVC – Thin wall, low intraluminal
pressure – Impaired venous return
• Superior Mediastinal Sx – Airways more compliant
and compressible in children
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Wilson et al. NEJM 2007: 356 (18): 1862
Pathophysiology - SVCS
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Clinical Picture – SVCS/SMS
Airway Compromise
• Cough (54%) • Dyspnea (54%) • Hoarseness (17%) • Stridor (4%) • Tachypnea • Orthopnea • Wheezing • Anxiety
CNS
• Syncope (10%) • Headache (9%) • Confusion (4%) • Lethargy (2%) • Blurry vision (2%) • Papilledema • Ear fullness
Venous Obstruction
• Facial swelling, edema (82%)
• Engorged chest wall vessels (53%)
• Arm edema (42%) • Cyanosis of face,
neck, & upper extremities
• Petechiae of head, neck, arms, & trunk
• Pleural effusion • Pulsus paradoxsus
Seth & Bhat, Ind J Pediatr, 2011 Wilson et al., NEJM, 2007
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Clinical Picture – SVCS / SMS
• Rare entity in pediatrics • Malignancy #1 primary cause
– Other paraneoplastic etiologies: thrombosis, infection
• St. Jude’s Experience (n= ~3700) – Non-hodgkin’s Lymphoma: 70% with mediastinal
mass – Hodgkin’s: 30% – Respiratory compromise in up to 75%
Seth & Bhat, Ind J Pediatr, 2011
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Diagnosis and Management – SVCS/SMS
• Diagnosis – History, Physical, CBC, CXR, CT, Echo • Management
– IV access (lower limbs if possible), hydration – Keep pt calm, minimal handling, no sedation – Upright, left lateral position with face mask O2 – CT scan ASAP – Tissue diagnosis ASAP
• Least invasive means possible with minimum of sedation • Pleurocentesis/Pericardiocentesis (also therapeutic) • Lymph node biopsy • Peripheral blood/tumor markers
– Monitor and treat TLS – ECMO on standby if available – Start treatment (chemo or radiation) – Intubate only for life threatening obstruction
Seth & Bhat, Ind J Pediatr, 2011
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Intubation?
ET tube stops here
Airway obstruction occurs distally
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12yM w/leg pain/tingle, incontinence. Won’t walk. Mass on CXR. Neuro consult tomorrow?
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Spinal Cord Compression
Ewing Sarcoma Pediatricneurosciences.com
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SCC - Oncologic Differential Diagnosis
• Neuroblastoma • Metastatic Brain Tumor • Primary Spinal Tumor • Ewing Sarcoma • Osteosarcoma • Rhadbomyosarcoma • Lymphoma/Leukemia
(chloromas) • Soft tissue sarcoma
Oncolink.org
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SCC - Signs and Symptoms
• Acute cord compression – 3-5% of children at diagnosis – Spinal or para-spinal in origin
• Local or radicular pain > 80% – May be present for weeks
• Weakness / Sensory loss / Paresis – Motor weakness often present at diagnosis – Incontinence (cauda lesions) – Paraplegia / Quadriplegia can progress rapidly &
can be irreversible
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Management - SCC
• Any compromise of the spinal cord, conus medullaris, or cauda equina requires emergent attention
• Imaging – X-ray can miss up to 50% of cases – Back pain alone: MRI within 24h – Emergent MRI if non-ambulatory or significant deficits
• Emergent Surgery, Radiation, Chemotherapy • Dexamethasone in some situations • Prognosis: better if tx within 10 days of onset, regain of
function better in children
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4yF. ALL d32 induction. Call to clinic T102 at 4pm. Looks OK per mom. ONC clinic in a.m. ok?
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Pt coming to the Blank 3. 13yF day 24 ALL induction. Fever, HR 140. CR ~ 3 sec. Looks “gray.”
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Fever and Neutropenia • This is a medical
emergency • Every oncology patient on
therapy needs immediate evaluation for new fever
• Fever (definition variable) – T>38.3° C x1 or – T>38.0°C x2 in a 24 hour
period • Absolute neutrophil count
(ANC) – < 500 or – < 1000 with expected decline – WBC count x (% segs + bands)
Pseudomonas aeruginosa
Meckler, Lindemulder. Emerg Med Clin N Am, 2009.
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Why are cancer pts at risk for life-threatening infection?
• Chemotherapy – Decreased number and
function of immune cells
• Radiation • Surgeries • Breakdown of
mucocutaneous barriers • Foreign bodies (CVL,
grafts, etc.)
Meckler, Lindemulder. Emerg Med Clin N Am, 2009.
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Fever and Neutropenia
• Infectious risk correlates with – Duration of neutropenia – Rate of decline – Degree of neutropenia (ANC < 100 vs. ANC < 500)
• Nadir of neutropenia occurs ~7-14 days post-chemo, but can occur at any point on treatment
Meckler, Lindemulder. Emerg Med Clin N Am, 2009.
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F & N – Common Pathogens GP
Bacteria
Staph spp
Strep spp
Enterococcus spp
Corynebacterium spp
Bacillus spp
Clostridium spp
GN Bacteria
E. Coli
Pseudomonas aeruginosa
Klebsiella spp.
Enterobacter
Anaerobes
Viral
HSV, VZV
RSV, Influenza, Parainfluenza
Adenovirus
Rotavirus, enterovirus
CMV, EBV, HHV6
BK, JC
Fungal
Candida spp
Aspergillus spp
Zygomycetes
Fusarium
Scedosporium
Cryptococcus
Other
Pneumocystis jiroveci
Protozoa
Meckler, Lindemulder. Emerg Med Clin N Am, 2009.
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F & N – General Management Principles
• Rapid triage and evaluation • CBC with differential and LARGE VOLUME blood culture
– From central line, ALL LUMENS – Ideally least 5 mL (min 2 mL) – Peripheral blood culture controversial
• Other studies only as clinically indicated (CXR, UA, etc.) • Immediate broad spectrum antibiotics • No rectal manipulation
– Theoretical risk of bacterial translocation • Frequent reassessment
– Hypotension, hypothermia, vomiting, shaking chills • Culture q24h if while febrile, or in situations of clinical decline
Meckler, Lindemulder. Emerg Med Clin N Am, 2009.
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F & N – Antibiotic Coverage • Microbial diagnosis made: Only 10-30%
– Usually bacterial (85-90% of the time), Pathogen dynamics vary by geography
• Individual antibiotic choices vary by institution, principles are similar • Broad spectrum Abx with anti-pseudomonal coverage
– Cefipime, Piperacillin-Tazobactam, Ceftazidime, Meropenem – Give this anti-gram-negative Abx FIRST – Double cover for gram-negatives if toxic or awaiting speciation (Gentamicin, Amikacin)
• Add gram-positive coverage (Vancomycin, Clindamycin) in certain situations
– If toxic, or suspicion of gram positive infection (skin/soft tissue infections) – AML s/p HD-Ara C (Viridans Strep)
• WATCH OUT FOR BACTERIOLYSIS AFTER ANTIBIOTICS – Be prepared for decompensation, observation period before transfers – Anticipate need for blood products, more liberal transfusion criteria
• Rotate antibiotics through all lumens Meckler, Lindemulder. Emerg Med Clin N Am, 2009.
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F & N - Prognosis • Must continue to treat even if other source of fever proposed (Ara-C, viral) • Gram negative sepsis mortality
– Historically 80% – Now 1-3%
• Increased risk of first line failure – Pneumonitis – Severe Mucositis – Signs of shock, hypotension – Dehydration – Relapsed disease, bone marrow transplant
• Second line: rarely indicated emergently – F/N x 5 days: chest, abdomen, sinus investigation + ambisome – Antivirals – G-CSF/GM-CSF (non-emergent, not shown to reduce mortality)
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4yM on Blank 4 w abd pain. s/p chemo for Burkitt’s 10d ago. No BM x 4d. Increase Miralax?
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10 days following chemotherapy for Burkitt lymphoma. Now fever, neutropenia, obstipation, abdominal pain: TYPHLITIS
Abdominal Pain
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Neutropenic Colitis
• Necrotizing colitis of the cecum in neutropenic patients
• Pathogenesis – Bacterial / fungal invasion of cecal mucosa
• Pseudomonas, Klebsiella, Enterobacter most frequent • Other gram negative rods • Gram positive: Clostridium • Fungal: Candida & Aspergillus
– Can progress into full thickness infarction and perforation
Destruction of normal mucosa (chemo, xrt, cancerous infiltrates)
Intramural hemorrhage (↓plts)
Shift in normal flora (Abx, hospitalization)
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www.meddean.luc.edu radiology.rsna.org
Neutropenic Colitis
• Thickened cecum • Peri-intestinal soft-tissue stranding • Free Fluid • Pneumatosis Intestinalis
Van de Wetering, Supp Care Can, 2003
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Neutropenic Colitis - Evaluation • Clinical
– ~1 week of neutropenia prior – Diffuse abdominal pain, possibly RLQ – Triad: fever, abdominal pain, diarrhea
• Laboratory – CBC, lytes, LFTs, Amylase/Lipase – Blood culture
• Imaging – Abdominal x-ray (flat and decubitus) – CT scan – Pneumatosis or non-specific bowel wall thickening
• False negatives: CT 15%, US 23%, AXR 48%
Van de Wetering, Supp Care Can, 2003
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Neutropenic Colitis - Management • High mortality rate • Medical
– Pain control – Bowel rest / NG suctioning – Broad spectrum antibiotics
• eg. Piperacillin-Tazobactam, Metronidazole, Vancomycin – Blood Products, fluid replacement
• Surgical – Intervention rarely indicated – Persistent bleeding – Perforation – Clinical deterioration, septic picture requiring pressors – Development of another intrabdominal process that normally requires
surgery
Van de Wetering, Supp Care Can, 2003
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Summary
• Oncologic emergencies are common in the pediatric population
• The majority of these can be anticipated with awareness of the clinical situation
• Teamwork and communication among health care professionals is essential to good outcomes
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References • Special thanks to Paul Harker-Murray, MD, PhD of
UTSouthestern/Children’s Medical Center of Dallas
• Selected publications: – Howard et al. The Tumor Lysis Syndrome. NEJM,
2011;364:1844-54. – Nazemi, Malempati. Emergency Department Presentation
of Childhood Cancer. Emerg Med Clin N Am 27 (2009) 477–495.
– Meckler, Lindemulder. Fever and Neutropenia in Pediatric Patients with Cancer. Emerg Med Clin N Am 27 (2009) 525–544.
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References
Wendy Woods-Swafford, MD, MPH • Leukemia • Paliative Care
Carla Schwalm, MD • Late Effects and Survivorship • Nutritional Anemias
Christopher Rokes, MD • Solid Tumors • Neuro-oncology
Nick Fustino, MD • Sickle Cell Disease • Embryonal Solid Tumors
Blank Children’s Hospital
Pediatric Hematology-Oncology 1215 Pleasant St., Suite 306
Des Moines, IA 50309 Phone: 515-241-8912
Fax: 515-241-8988