the landscape of neuroendocrine tumors in 2019 speaker presentations/session 1a 1b...clinical trial...
TRANSCRIPT
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The Landscape of Neuroendocrine Tumors in
2019
Daniel Rayson MD FRCPC
Attending Medical Oncologist, QEII HSC
Professor of Medicine, Dalhousie University
Halifax, Nova Scotia
CANM, Ville de Quebec
Feb 8 2019
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Disclosures
▪ Honoraria for advisory meetings/CME lectures
▪ Clinical trial as PI/sub-I (funding to institution only)
▪ Ipsen, Novartis, Roche, Pfizer
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I/You have a what???
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Incidence v Prevalence
Rate
Per
100,000
%
Since
1994
Absolute*
New Cases
2009
All Cancers 611.42 13% 62,174
All NETS 5.86 138% 596
Small Intestine
NETS1.01 140% 103
*Hallet J et al. Cancer 2014.
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Diagnostic difficulties
▪Many cases grow very slowly without any symptoms, or
hormonal syndrome, over years
▪Those with symptoms are often diagnosed and treated
for other benign conditions before anyone thinks of NET
▪Some NET specific tests are not readily available, or
considered, across Canada
▪Historically, medical hoofbeats means horses, not
zebras
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Variable presentations and symptoms
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TTF1 CDX1
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The Spectrum of Neuroendocrine
tumors of _____ origin
Appendiceal
Carcinoids
Small
Incidental
Neuroendocrine
Carcinoma
‘Indolently’Metastatic
Potential
Poorly
Differentiated
Variably
ProliferativeCarcinoid/
Other Syndromes
Functional
(~20-30%)
Non-Functional
Ki-67 Index
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Proliferation and NETS
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New 2017 WHO classification of NETs
• G3 NET and G3 NEC have distinct molecular signatures
Mitoses
(per 10
HPF)
Ki67
indexMorphology
G1 NET <2 <3% Well differentiated
G2 NET 2–20 3–20% Well differentiated
G3 NET >20 >20% Well differentiated
G3 NEC
• Small cell type
• Large cell type
>20 >20%Poorly
differentiated
DAXX/ATRX/
MEN1
p53/Rb1
Pathologic features1
(mutant genotype / loss of
nuclear labelling)
NET, neuroendocrine tumour; NEC, neuroendocrine carcinoma
1. Yachida et al. Am J Surg Pathol. 2012;36(2):173–84.
2. Tang et al. Clin Cancer Res. 2016;22(4):1011–7.ENETS 2017A. Perren, Session 3A: Aggressive NEN,
March 9, 2017.
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Functional imaging and NET therapeutics
• Patients with lesions showing high SSTRI uptake are obvious candidates for PRRT
• Lesion(s) showing both FDG and SSTRI avidity, suggesting intermediate-grade clinical behaviour, may also benefit from PRRT
• Further validation is neededG1 Ki67<2% G2 Ki67 2–20% G3 Ki67 20–55% G3 Ki67 >55%
Unsuitable for PRRTSuitable for PRRT
“Sweet spot” for PRRT
FD
G-P
ET
++
SS
TR
-Octr
eo
scan
++
PRRT, peptide receptor radionuclide therapy; SSTRI, somatostatin receptor imaging
R. Hicks. Workshop: Imaging Update, March 10, 2017.
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Functional Disease
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▪ Insert Ostry Slide #3: EM
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Clinical Characteristics of functional pNETS
Tumor Type SyndromeMetastatic
Incidence
Extrapancreatic
Location?
Insulinomasymptomatic
hypoglycemia<15% rare
Glucagonoma
rash-NEM
diabetes
cachexia
most rare
VIPoma WDHA syndrome most ~10%
Gastrinoma
refractory peptic
ulcers
diarrhea
<50% often duodenal
Somatostatinomadiabetes
diarrheamost rare
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Spectrum of Symptoms Associated with
Carcinoid Syndrome
Creutzfeldt W. Carcinoid tumors: development of our knowledge. World J Surg. 1996;20:126-131
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Serotonin
metabolism
and carcinoid
syndrome
Telotristat Etiprate
Somatostatin Analogues
AM: 24hr urinary 5-
HIAA: 407umol/L
(N < 50)
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Somatostatin Analogues
▪ First-line therapy due to efficacy in controlling functional syndrome, prolonging disease stability, tolerability, excellent patient support programs
▪ Two options:
▪ Sandostatin LAR 30mg
▪ Somatuline Autogel 120mg
▪ Both given by injection: IM v SC
▪ Both very well tolerated in general:
▪ Minimal discomfort
▪ Transient stool changes: fat malabsorption
▪ Slight longer term increased risk of gall bladder sludge/stones
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Phase II data: Octreotide LAR
Rubin J et al J Clin Oncol 1999
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Phase II data: Octreotide LAR
Rubin J et al J Clin Oncol 1999
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SSAs as anti-proliferative agents
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Median OS 84.7m; NS
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Clarinet: Prespecified PFS Analysis by Tumor Origin
HR derived from Cox proportional hazards model. CI, confidence interval; HR, hazard ratio; NETs, neuroendocrine tumors; PBO, placebo; PD, progressive disease; PFS, progression-free survival; PNETs, pancreatic neuroendocrine tumors.
Caplin ME, et al. N Engl J Med. 2014;371(3):224-233.
0 3 6 9 12 18 24 27
0
10
20
30
40
50
60
70
80
90
100
Pat
ien
ts a
live
and w
ith n
o p
rogre
ssio
n (
%)
Time (months)P
atie
nts
ali
ve
and w
ith n
o p
rogre
ssio
n (
%)
Lanreotide
8 events / 33 patients
Median PFS not reached
Placebo
21 events / 40 patients
Median PFS = 21.1 months [95% CI: 17.0, NC]0
10
20
30
40
50
60
70
80
90
100
Time (months)
0 3 6 9 12 18 24 27
Lanreotide
18 events / 42 patients
Median PFS not reached
Placebo
31 events / 49 patients
Median PFS = 12.1 months [95% CI: 9.4, 18.3]
PNETs (n=91)
Lanreotide 120 mg vs
PBO: HR=0.58
[95% CI: 0.32, 1.04]
Midgut NETs (n=73)
Lanreotide 120 mg vs
PBO: HR=0.35
[95% CI: 0.16, 0.80]
42 39 32 29 24 20
49 48 38 33 23 17
13
Numbers of patients at risk of death or PD
8 0
033 33 32 30 28 24
40 39 36 32 28 20
16
Numbers of patients at risk of death or PD
13 0
0
PROMID HR = 0.34 95% CI 0.20, 0.59
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CLARINET: Safety – Adverse Events
*Includes one or more serious adverse events (SAEs) defined as any event that results in death, is life threatening, results in hospitalization or prolongation of hospitalization, results in persistent or significant disability, results in congenital anomaly/birth defect, or may jeopardize the patient and may require medical or surgical intervention to prevent one of the outcomes listed.
**Defined as hazardous to well-being, or significant impairment of function or incapacitation.Somatuline Depot (lanreotide) injection [Prescribing Information]. Basking Ridge, NJ: Ipsen Biopharmaceuticals, Inc; 2014.
Any (%) Severe** (%) Any (%) Severe** (%)
Any adverse reactions 88 26 90 31
Abdominal pain 34* 6* 24* 4
Musculoskeletal pain 19* 2* 13 2
Vomiting 19* 2* 9* 2*
Headache 16 0 11 1
Injection site reaction 15 0 7 0
Hyperglycemia 14* 0 5 0
Hypertension 14* 1* 5 0
Cholelithiasis 14* 1* 7 0
Dizziness 9 0 2* 0
Depression 7 0 1 0
Dyspnea 6 0 1 0
> 5% incidence with > 5% diff c/w placebo
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Key Questions at each decision point
▪Does this patient need treatment at this time?
▪ Is this change on the scan significant enough to pose a
threat or to change/add treatment?
▪Are there new/progressive functional symptoms?
▪ Is there something we can do to target the specific area of
disease?
▪ Is there a surgical option for significant debulking?
▪ Is the tumor somatostatin-avid and do we have access to
PRRT?
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Inadequate control of carcinoid syndrome:
more than just dose escalation
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Unmet medical need in poorly controlled
carcinoid syndrome
▪Daily symptoms impacting QOL, functional capacity,
work status, social interactions
▪Prolonged survival times therefore long duration of
symptom burden
▪Polypharmacy and/or invasive intervention required for
symptom control in absence of syndrome-specific
therapy
▪Carcinoid heart disease risk is a function of persistent
syndrome and elevated 5-HIAA and a major source of
mortality
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Lanreotide PRO study: SSA dose is not always
the issue
▪30% had other potential causes of diarrhea.
▪Of these:
▪44%: small bowel resection
▪ bile salt malabsorption : Questran
▪ bacterial overgrowth: ? role of abx ?
▪32%: pancreatic insufficiency ***
▪ Pancreatic enzymes
▪24%: Ileocecal valve/colonic resection:
▪ Immodium/Loperamide
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SSA Dose Escalation
Uncontrolled
symptom prior to
escalation
Number of
patients reporting
% reporting
improvement or
resolution
Flushing 90 81%
Diarrhea 107 79%
• Major limitations include retrospective nature of the data, uncertain follow-up time,
no standardized reporting, potential reporting bias, no control for concomittant Rx
• Max dose 133 mg q 4 wk; 21 patients received at least 1 dose escalation > 60mg
Strosberg J et al The Oncologist 2014
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Serotonin
metabolism
and carcinoid
syndrome
Telotristat Etiprate
Somatostatin Analogues
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NET of small intestinal origin: disease
progression after SSA
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NETTER-1: Lu-177 PRRT in progressive disease
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177Lu-Dotatate
(n = 101)
Control
(n = 100) P Value†
Complete
response (%)1 0 N/A
Partial
response (%)17 3 N/A
Response
Rate % (95%
CI)
18 (10–25) 3 (0–6) <0.001
Objective response rates to LU-177 and high
dose SSA
Strosberg J et al, NEJM 2017
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Any (%) Gr3/4 (%) Any (%) Gr 3/4(%)
Nausea 59 4 12 2
Vomiting 47 7 10 1
Fatigue 40 2 25 2
Appetite 18 0 8 3
Headache 16 0 5 0
Alopecia 11 0 2 0
Platelets 25 2 1 0
Anemia 14 0 5 0
Lymphos 18 9 2 0
Significant toxicity differences in
Netter-1
Strosberg J et al NEJM 2017
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RADIANT-4 Study Design
Everolimus 10 mg/d +
best supportive care*
n = 207
Placebo +
best supportive care*
n = 203
Multi-phasic CT or MRI performed every 12 weeks
Treatment
until disease
progression
• N = 302
•2:1 randomization
•Non-functional
•Within 6 m of
radiologic
progression
Crossover
1:1
* Concurrent somatostatin analogs allowed
R
A
N
D
O
M
I
Z
E
Primary endpoint:• PFS (central review)
Randomization August 2007 - May 2009
Progressive, non-functional NET of GI (non-pancreatic)and lung origin
Yao et al. NEJM 2011, Lancet 2016.
PFS: 11m v 3.9m;
HR 0.48 (CI: 0.35-0.67)
P < 0.00001
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> 24 m improvement
in median PFS in
Netter-1
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▪Other systemic options –
approach with caution in
functional disease
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Hepatic-Directed Therapy
Resection
Hepatic arterial ligation
Hepatic arterial embolization +/- chemotherapy
Hormonal response: 50% - 100%
Tumor response: 27% - 86%
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Radioembolization
ischemia
radiation
Source: Bilbao, JI. Interventional Radiologist, Pamplona, Spain
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Systemic Options for pNET
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Systemic options in pNET
ORR Δ PFS ΔOS Comment
Somatuline 0%Not reached v
12 m-
90% non-
progressing at
study entry
Everolimus 5% v 2% 11m v 3.9 m -
Toxicity profile
can be difficult/
hyperglycemia
Sunitinib 9.3% v 0% 11.4 v 5.5m -
Stopped early-
? Over-
optimistic PFS
impact
CapTem*** 70%
(21/30)Median = 18 m -
Retrospective
data
NETTER 1: midgut NETS only
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CAPTEM
▪Oral combination chemotherapy regimen
▪Capecitabine 750mg/m2 BID
▪Temozolomide 150-200mg/m2 daily
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CapTem meta-analysis (15 studies; n = 384)
Lu Y et. Al Medicine 2018
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CapTem meta-analysis (15 studies; n = 384)
Disease control rates (CR/PR/SD)
Lu Y, Medicine 2018
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NET challenges and opportunities
▪ Integration of PRRT into Canadian NET landscape
▪Sequencing of multiple potentially efficacious therapies:
▪Toxicities
▪Cost
▪ Individualization not just precision
▪ ? Role for Immunotherapies in Grade 3 NEC ?
▪ Optimization of syndromic control
▪ Decrease risk/incidence of carcinoid heart disease
▪ Improve QOL
▪ Defining role of hepatic-directed therapies in the new
era of NET clinical trials and need for level 1 evidence
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The importance of multidisciplinary,
interprovincial collaborative care
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KK
53 yo man witn no comorbidities
▪ March/2011: acute hemorrhagic left-sided CVA
▪ Full cerebrovascular and neurologic w/u negative except for new onset insulin-
controlled diabetes mellitus diagnosed ~ 6 months prior
▪ As part of evaluation: CT scan
▪7 cm duodenal mass in context of iron-definiciency anemia
▪ Laparatomy: 7 cm duodenal paraganglioma, 1 of 2 nodes +, CgA/Syn +
Ki-67 index: 10%
▪ 6 weeks post-op: complete resolution of DM, off all medications
▪ Discharged from active F/U
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KK
▪June-July 2015: recurrent issues with glycemic control
▪August 2015: acute onset upper abdominal
pain/diaphoresis
ECG- acute STEMI with elevated troponins
coronary angiogram: negative for CAD, treated medically
▪December 2015: new onset constipation: CT
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CT shows several abdominal masses
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123I-MIBG: uptake in the masses,
but more intense in the anterior mass
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Scan 1 week after 200mCi 131I-MIBG: almost all of the activity went into
the anterior mass (2 of the other foci are just the normal adrenals). This
happened twice (ie we treated twice with 200mCi, and post therapy
scan showed almost all activity went to the one mass).
Cross sectional imaging: Jan 9/2017 c/w
July/22/2016:
Anterior abdominal mass: minor
response
All other masses: minor
progression/stable
Therapeutic MIBG: 200 mCi of I131 MIBG- 2
cycles: April and Sept 2016
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KK
▪Therapeutic MIBG: 200 mCi of I131 MIBG- 2 cycles:
April and Sept 2016
Amine Feb/16/2016 Jan/29/2017
U Norepinephrine
(N: 0-591 nmol/TV 8706 10675
U Norepinephrine
(N: 0-30 umol/molC 864.5 897.8
U Dopamine
(N: 392-2500 nmol/TV) 3682 12728
U Dopamine
(N: 0-185 umol/molC) 365.7 1070.5
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18F-FDG PET:
- all lesions are ++ hot, including a few previously unknown
- less in anterior mass: ? d/t 131I-MIBG Rx. ? Different biology.
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18F-FDG PET
111In-Octreotide:
~ per FDG (allowing for lower resolution,
sensitivity)
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KK
▪Wrong target or intratumoral heterogeneity?
▪Octreoscan: avid disease, Krenning 3
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KK
▪Therapeutic Lu-177: May/July/Sept/November 2017
▪Tolerated without toxicity
▪He learned a few words of French
Amine Jan/29/2017 Sept/27/2018
U Norepinephrine
(N: 0-591 nmol/TV 10675 674
U Norepinephrine
(N: 0-30 umol/molC 897.8 57.3
U Dopamine
(N: 392-2500
nmol/TV)12728 1775
U Dopamine
(N: 0-185
umol/molC)1070.5 150.6
Cross Sectional
Imaging:
33.6% reduction in
X-sectional
diameter of target
lesions Oct 2018
c/w July 2016: PR
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