the role of sentinel lymph node biopsy and axillary...
TRANSCRIPT
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The Role of Sentinel Lymph Node Biopsy and Axillary Dissection
The Role of Sentinel Lymph Node Biopsy and Axillary Dissection
Henry Mark Kuerer, MD, PhD, FACSDepartment of Surgical Oncology
University of Texas
MD Anderson Cancer Center
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SLN BiopsySLN Biopsy• Revolutionized surgical
practice• Marked decreased
need for axillary dissection
• Major decrease in lymphedema, shoulder dysfunction, pain/parasthesia rates
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Lymphatic Mapping TechniqueLymphatic Mapping Technique
Radioactive colloid, blue dye
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2010 AJCC Staging Changes: Definitions2010 AJCC Staging Changes: Definitions• pN0(i+): Cluster < 0.2 mm • Classification of ITC < 200 cells on
histologic section• Micrometastases: 0.2 to 2 mm• Stage I now TWO GROUPS
– IA: T1 NO MO– IB: T0 N1mi M0
T1 N1mi M0Edge et al, 2009
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SLN TrialsRecent Results from US
Trials 1998-2004
SLN TrialsRecent Results from US
Trials 1998-2004
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Practice Patterns: US National Cancer Database 1998 - 2005
Practice Patterns: US National Cancer Database 1998 - 2005
Bilimoria K, et al. J Clin Oncol 2009
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NSABP Protocol B-32 N=5,611NSABP Protocol B-32 N=5,611Clinically Negative Axilla
RANDOMIZATION
SLN Biopsy* and Axillary Dissection
SLN Biopsy
PathologicallyPositive SLN
Axillary Dissection
PathologicallyNegative* SLN
No Axillary Dissection
* IHC performed on Neg SLNs
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NSABP B-32 False Negative RateNSABP B-32 False Negative Rate
9.7%
(7.6 - 11.9)*
*95% CI
Julian et al, SABC, 2004
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NSABP B-32Sentinel Node by Biopsy Type
NSABP B-32Sentinel Node by Biopsy Type
Type Technical Success %
False Negative Rate
%OverallFNA/CoreIncisional
97.197.097.6
9.78.0
14.3Excisional 97.3 15.2
P=0.83 P=0.02
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Clinically Negative Axillary Nodes
GROUP 1SN +AD
SN Neg(SN only)
GROUP 2SN
Stratification• Age• Clinical Tumor Size• Type of Surgery
B-32
SN pos+ AD
SN Pos SN Neg(SN+AD)
Intraop cytology & postop HE
FUFU
1,975 patients
Randomization
2,011 patients
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B-32 Analysis Plan
3,989 - SN neg (71% of 5611) 99.9% - follow-up information 7.92 years - average time on study
Primary endpoints OS, DFS, Regional Control Study powered to detect 2% difference OS
Krag et al ASCO 2010
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B-32 DFS
Years After Entry
% D
isea
se-F
ree
0 2 4 6 8
020
4060
8010
0NSABP Protocol B-32
Disease-Free Survival for Sentinel Node Negative Patients
Trt N DeathsSNR+AD 1975 315SNR 2011 336 HR=1.05 p=0.542
Data as of December 31, 2009
Krag et al ASCO 2010Krag et al Lancet Oncol 2010
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Group 1 Group 2
Local 54 (2.7%) 49 (2.4%)
Axillary 2 (0.1%) 8 (0.3%)
Extra-axillary 5 (0.25% 6 (0.3%)
Local and Regional Recurrencesas First Events
B-32 RR
Krag et al ASCO 2010Krag et al Lancet Oncol 2010
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Group 1SN + AD
Group 2SN
Shoulder abduction deficit 19% 13%Arm volume difference >5% 28% 17%Arm numbness 31% 8%
Arm tingling 13% 7%
All differences p<0.001
Residual Morbidity at End of Follow-up
B-32 Morbidity
Ashikaga et al JSO, 2010
• Lower in SN group• Not nonexistent
Krag et al Lancet Oncol 2010
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Effect of Occult Metastases on Survival in “Node-Negative” Patients: NSABP B-32
Effect of Occult Metastases on Survival in “Node-Negative” Patients: NSABP B-32
• Occult metastases: 15.9%• Independent predictor of prognosis• Overall survival difference: 1.2%
– 94.6% v. 95.8%• Concluded no clinical benefit of serial
sectioning and or IHC Weaver et al, NEJM, 2011
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NSABP B-32Overall Conclusions
No significant differences were observed OS, DFS, or Regional Control SLN vs AD Morbidity decreased
When the SN is negative, SN surgery alonewith no further AD is appropriate, safe, andeffective therapy for breast cancer patientswith clinically negative lymph nodes.
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American College of Surgeons Oncology Group SLN Trial
American College of Surgeons Oncology Group SLN Trial
T1 and T2 TumorsClinically Negative Axilla
BREAST CONSERVATION
SLN Biopsy
-Axillary Observation
+
Randomization
Axillary Observation Axillary Dissection
Z10 Z11Bone MarrowIHC
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ACOSOG Z0010 - MethodsACOSOG Z0010 - Methods
• SLNs processed - standard pathology and H&E staining
• SLNs neg by H&E subjected to IHC for cytokeratin (investigators blinded to results)
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Z0010 Treatment VariablesZ0010 Treatment VariablesTotal SLNs Removed
Median (Min, Max)Missing
2 (0,32)689
ALND Performed, N(%)YesNoMissing
925(18.0)4203(82.0)
82
Chemotherapy, N(%)YesNoMissing
2297(53)2035(47)
878
Hormonal Rx, N(%)YesNoMissing
2943(67.9)1389(32.1)
878
Radiation Rx, N(%)YesNoMissing
3884(90.8)394(9.2)
932
Any Adj Rx, N(%)YesNoMissing
4210(98.4)68(1.6)
932
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Overall Rate IHC Positive SLNs Z10Overall Rate IHC Positive SLNs Z10
5210 Eligible and Evaluable Patients
SLN H&E NegativeN=3995 (76%)
IHC NegativeN=2977 (90%)
IHC PositiveN=349 (10%)
SLN H&E PositiveN=1215 (24%)
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ACOSOG Z0010: Occult MicrometastasesACOSOG Z0010: Occult Micrometastases• 5-year overall survival was significantly higher with a negative vs. positive result for:
− SLN H&E (≈ 96% vs. 93%; P = .0009)− BM IHC (95% vs. 90%; P = .01)
• SLN IHC was NOT significantly associated with overall survival.
Overall SurvivalMultivariable Analysis (Positive vs. Negative)HR (95% CI) P Value
All PatientsSLN H&E 1.44 (1.11-1.88) .007
BM IHC 1.88 (1.12-3.17) .017SLN H&E– Patients
SLN IHC 0.98 (0.62-1.54 .93BM IHC 2.22 (1.21-4.10) .011
Giuliano et al JAMA 2011
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ACOSOG Z10 ConclusionsACOSOG Z10 Conclusions
• IHC detected SLN metastases do not appear to impact overall survival
• Routine examination of SLN by IHC is not supported in this patient population by this study
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ACOSOG Z0011: A Randomized Trial of Axillary
Node Dissection in Women with Clinical T1-2 N0 M0 Breast Cancer who have a Positive Sentinel Node
Giuliano AE, McCall L, Beitsch PD, Whitworth PW, Blumencranz PW, Leitch AM, Saha S, Hunt K, Morrow M,
Ballman KV
Giuliano et al JAMA 2011
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Study Population Schema 5/99–12/04
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106 (27.4%) patientstreated with ALND
had additional positivenodes removed
beyond SLN
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72.6% patientstreated with SLND had all positive
nodes removed with the technique
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Patient Characteristics Z11Patient Characteristics Z11• Median age: 55 years• 70% T1 tumors• 82% ER-positive disease• All patients had node positive breast
cancer (overall low burden)– 58% had only one node positive– Only 21% had ≥ 3 positive nodes
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Locoregional RecurrencesSLND
(436 pts)ALND
(420 pts)
2 (0.5%) 4 (0.9%)Regional (Axilla, Supraclavicular)
15 (3.6%) 8 (1.8%)Local (Breast)
17 (4.1%) 12 (2.8%)Total Locoregional
Recurrence
Median follow-up = 6.3 years
Regional recurrence seen in only 0.7% of the entire population
P = 0.11
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29
Disease-Free Survival
0
10
20
30
40
50
60
70
80
90
100
0 1 2 3 4 5 6 7 8
Time (Years)
% R
ecur
renc
e-Fr
ee a
nd A
live
ALNDNo ALND
P-value = 0.14
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300
10
20
30
40
50
60
70
80
90
100
0 1 2 3 4 5 6 7 8
Time (Years)
% A
live
ALNDNo ALND
P-value = 0.25
Overall Survival
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31
IMPORTANT Caveats
• WHOLE BREAST RADIATION• Breast conserving therapy
• Adjuvant Systemic Therapy
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SLNDALND
Adjuvant Systemic Therapy
Chemotherapy 57.9% 58.0%
Hormonal therapy 46.4% 46.6%
Either/Both 96.0% 97.0%
P = N.S.
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Recommendations at MD Anderson for + SLN? Recommendations at MD Anderson for + SLN?
• Must be individualized• No dissection:
–T1/T2–One or two positive SLNs–If Whole-breast radiotherapy–Receiving systemic therapy
Caudle, Hunt, Kuerer et al Ann Surg Oncol, 2011
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Recommendations for Axillary Node Dissection at MD Anderson
Recommendations for Axillary Node Dissection at MD Anderson
• Positive SLN–Mastectomy–Partial breast radiotherapy–Neoadjuvant chemotherapy
Caudle, Hunt, Kuerer et al Ann Surg Oncol, 2011
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Sentinel Node Evolving
Controversies
Sentinel Node Evolving
Controversies
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ComplicatedDoes the axilla need to be treated
when positive SLN?
ComplicatedDoes the axilla need to be treated
when positive SLN?
Many radiation oncologists will treat the axilla when a positive SLN is obtained and no dissection is performed
*
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Extended Field Radiotherapy?Extended Field Radiotherapy?
• Which patients?•Recent presented MA.20 results•Concern for over treatment/risk
**
*
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Toxicity?Toxicity?
• Overall Survival for early Stage II breast cancer very high (>90%)
• What will be the long term effects on healthy: –Lymphatics?
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Can Axillary Radiation Be Substituted for Completion
Axillary Lymph Node Dissection
Can Axillary Radiation Be Substituted for Completion
Axillary Lymph Node Dissection
When a Sentinel Lymph Node Contains Metastases ?
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AMAROS EORTC 10981AMAROS EORTC 10981
• Tumor < 5 cm• 4827 Total Patients• SLN-Positive• Randomized Component of Trial
•ALND vs. Axillary Radiotherapy
*
Straver et al Ann Surg Onc & J Clin Onc 2010
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Sentinel Node Biopsy Before or After Neoadjuvant
Chemotherapy ?
Sentinel Node Biopsy Before or After Neoadjuvant
Chemotherapy ?
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SLN Biopsy Before Neoadjuvant Therapy
SLN Biopsy Before Neoadjuvant Therapy
• Commits patients to an extra axillary operation
• SLN Negative: Two operations • SLN Positive: Commits patients to
axillary lymph node dissection with a positive SLN before therapy
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Conversion of Axillary Metastases:FNA Positive to Pathologic Negative
Conversion of Axillary Metastases:FNA Positive to Pathologic Negative
POSITIVE191
patientsFAC X 4
PathologicNEGATIVE
43 patients
23%Median # LNs Removed = 16
Kuerer et al, Ann Surg, 1999
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Conversion of Axillary Metastases:FNA Positive to Pathologic Negative
Conversion of Axillary Metastases:FNA Positive to Pathologic Negative
POSITIVE109
patientsTrastuzumab
+ A or T
PathologicNEGATIVE81 patients
74%Median # LNs Removed = 19
Dominici et al. CANCER, 2010
HER2+
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Impact of Nodal Disease Eradication on DFSIndependent Prognostic Factor
Impact of Nodal Disease Eradication on DFSIndependent Prognostic Factor
Months
Cum
ulat
ive
Prop
ortio
n Su
rviv
ing
Dis
ease
-free
0.0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1.0
0 10 20 30 40 50 60 70 80 90 100 110 120
P = 0.00003
Nodal Disease Eradicated
Residual Nodal Disease
Annals of Surgery, 1999
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• Identification Rate: 85%• With blue dye: 78%• With isotope + blue dye: 88-89%
• False Negative Rate: 11%• With blue dye: 14%• With isotope + blue dye: 8.4%
SNB After NCMulti-Center Studies: NSABP B-27
(n=428)
Mamounas EP: J Clin Oncol, 2005
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SNB After NCMeta-Analysis of Single-Institution
and Multi-Center Studies• Xing et al M D Anderson• 21 studies• 1273 patients• Identification Rates: 72-100%
–Pooled estimate: 90%• False Negative Rates: 0-33%
–Pooled estimate: 12%
Conclusion: SNB is a reliable tool forplanning treatment after NC
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Author Stage # Pts (Node +)
SuccessRate ( %)
FN Rate(%)
Accurate
Shen, 2006 T1-T4, N1-N3 69(40) 93 25 No
Lee, 2006 T1-T4, N1(Palpable and FNA (+)or > 1cm thick withloss of fat hilum onUS and SUV > 2.5
219 (124) 78 6 Yes
Newman, 2007
ResectableT1-3, N1(FNA (+) under US)
40 (28) 98 11 Yes
All 328 (172) 84 11.6
SNB After NC: Single Institution SeriesPositive Axillary Nodes Before NC
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PI - Judy C. Boughey MD
SLN surgery after neoadjuvantchemotherapy for node positive
breast cancer
SLN surgery after neoadjuvantchemotherapy for node positive
breast cancer
ACOSOG Z1071
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Z1071 schemaT1-4 N1-2 invasive breast cancer
(Pretreatment axillary ultrasound with FNA or core biopsy documenting axillary metastases)
REGISTER*↓
Patients receive chemotherapy(stratify patients by age, stage and
number of cycles and type of chemotherapy)↓
REGISTER*↓
SLN and ALND
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Alternatives to SLN Biopsy BEFORE
Neoadjuvant Chemotherapy?
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Initial Nodal Ultrasound and FNA BiopsyAvoiding Surgical SLN Biopsy
Krishnamurthy et al, Cancer 2002
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Pros and Cons in Timing of SLN Biopsy with Neoadjuvant TherapyPros and Cons in Timing of SLN
Biopsy with Neoadjuvant Therapy• Presence of axillary metastases can be
identified with either SLN biopsy or FNA before neoadjuvant therapy
• Chemotherapy can eradicate lymph node metastases in 30 to 40%– Axillary dissection may be avoided if SLN
biopsy performed after pre-op therapy
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Should Patients with DCIS be Offered SLN
Biopsy ?
Should Patients with DCIS be Offered SLN
Biopsy ?
DCIS
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Sentinel Lymph Node BiopsyPatients With ‘Pure’ DCIS
Sentinel Lymph Node BiopsyPatients With ‘Pure’ DCIS
• European Institute of Oncology• 223 unselected patients with DCIS• Metastases in 3.1%, most micromets• Completion dissection no additional
mets• Select patients – palpable mass ?
Diffuse disease ?Intra et al, Arch Surg 2003
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SLN Biopsy for ‘High Risk’ DCISSLN Biopsy for ‘High Risk’ DCIS• DCIS with microinvasion (N=31)
– 10% Positive SLN• ‘High-Risk’ DCIS (N=76)
– Palpable or mass on MMG– Extensive high-grade lesions
• 12% Positive SLN• Mastectomy = Lose chance for later SLN
Klauber-DeMore, Ann Surg Onc, 2000
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MD Anderson Cancer CenterSelective Use of SLN Biopsy in DCIS
MD Anderson Cancer CenterSelective Use of SLN Biopsy in DCIS
• 399 patients with INITIAL diagnosis of DCIS• 20% of patients will have invasive carcinoma
on final pathology– Predictors: CORE Biopsy diagnosis, age < 55,
HG tumors, > 4 cm on MMG• 10% positive SLN (H and E in 93%, n = 141)
– Highly selected group of patients
Yen et al, Journal American College of Surgeons, 2005
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Is Any Axillary Surgery in Elderly Women With ER+ Breast Cancer Needed?
Is Any Axillary Surgery in Elderly Women With ER+ Breast Cancer Needed?
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Axillary Surgery in the ElderlyAxillary Surgery in the Elderly• Info gained may not influence adjuvant
therapy selection or outcome• Three prospective trials:
– Evidence suggests that selected patients > 70 years, clinical normal axilla, ER+, < 2 cm, receiving endocrine therapy can safely avoid
Hughes et al NEJM, 2004; Martelli et al, CANCER 2008IBCSG J Clin Onc, 2006
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New Trials and Next StepsNew Trials and Next Steps
• Sentinel node vs. Observation after axillary UltrasouND (SOUND)
• N=1,560 • European Institute of Oncology, Milan• Eligibility: <2 cm, any age, negative
preop axillary US, breast conservation
Gentilini & Veronesi, Breast 2012
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Current Indications and Standards for Sentinel Node Biopsy
Current Indications and Standards for Sentinel Node Biopsy
Clinically NEGATIVE axilla – T1, T2, T3 tumors
• If a SLN is found to be positive:– Mastectomy: Completion dissection– Breast Conserving w WBT: Individualize
• DCIS: High-risk for Invasive and receiving mastectomy
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Current Indications and Standards for Sentinel Node Biopsy
Current Indications and Standards for Sentinel Node Biopsy
• Neoadjuvant therapy – Before or after chemo; prefer nodal
ultrasound with FNA biopsy– Risks and benefits should be discussed in
detail with patient
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