Thoracic Flashcards
What is 2L chemo for SCLC
topotecan
NCCN guidelines for 2L treatment of ES-SCLC
If relapse <6 months post platinum, preferred regimen is topotecan, lurbinectidin or clinical trial, ipi/nivo is classified as other
Number of cases of lung cancer per year
220000
What percentage of cases is SCLC
15%
Of the patients diagnosed with SCLC what share have LS
30%
Prognostic factors for LS-SCLC
- age
2. gender
Prognostic factors for ES-SCLC
age KPS gender # met sites baseline Cr
Markers positive for SCLC
synaptophysin
chromogranin A
CD56
Treatment for LS-SCLC
concurrent chemoRT
cis-etoposide x 4 cycles with RT to 45 Gy in 1.5 Gy BID
Dose of cisplatin for SCLC
80 mg/m2 day 1
Dose of etoposide for SCLC
100 mg/m2 day 1,2,3
How often are cycles of cis-etop given
q3 weeks
What is OS for chemoRT for LS-SCLC
4 year OS of 30%
Pignon meta-analysis compared
RT alone vs. CRT for LS-SCLC
Findings of Pignon
CRT 3 year OS of 14% vs. 9% RT alone so absolute OS benefit of 5%
What is absolute OS benefit for CRT over RT
5%
Per Pignon meta analysis which group benefited more
younger pts
Meta analysis showed that max benefit occurs when RT starts by week X of chemo
9
CONVERT trial design
Phase III of LS-SCLC randomized to
- 66/33 + cis etop 4-6 cycles
- 45/30 BID + cis etop 4-6
Findings of CONVERT
Failed to show superiority of QD vs. BID and stated BID should remain SC
CONVERT toxicity differences
No differences between arms in G3-4
For CONVERT trial when did RT start
cycle 2
V20 goal for SCLC
<30-40%
Mean lung dose goal
<20 Gy
Esophagus mean dose goal
<34 Gy
Spinal cord dose max goal
<36-37 Gy
SCLC Turissi volumes
GTV + 1.5 cm
What is the first line regimen for ES-SCLC
Carbo+Etoposide+Atezolizumab
OS in IMPOWER133 trial
Atezo: 12.3 months
No atezo: 10 months
CREST (Slotman) trial for ES-SCLC design
RCT of 4-6 cycles of EP –> any response
- thoracic RT + PCI
- PCI alone
Dose of thoracic RT used on Slotman trial
30/10
Outcome of Slotman trial
Improved OS at 2 years
chest RT: 13%
no RT: 3%
Improved PFS
Chest volumes included on Slotman trial
Post chemo tumor + 1.5 cm
Pre chemo nodes (even if CR)
Lung constraint on Slotman trial
V20 < 35%
Defined lung as lung - PTV
When should PCI be offered to patients
3-6 weeks after completion of chemo
Auperin meta analysis
Compared PCI vs. no PCI for patients with LS-SCLC
Results of Auperin meta-analysis
5% OS benefit at 3 years for patients who had PCI (20% v. 15%)
Dose of PCI
25/10 (studies of 36 Gy no better)
Slotman ES-SCLC PCI study
Any response to chemo randomized to
- PCI (20-30 Gy)
- no PCI
Slotman finding
1 year OS
27% with PCI, 13% without PCI
Brain met risk
15% (PCI) –> 40% (no PCI)
Any additional tox with PCI
did not affect global health score
Criticism of Slotman study
no pre PCI brain imaging unless symptomatic
Japanese PCI study
ES-SCLC with any response to chemo –> no brain mets on MRI –> randomized to
- PCI (25/10)
- no PCI
Results of PCI/no PCI OS
PCI: median of 11.6 months
No PCI: 13.7 months
Rate of BM at 12 months without PCI
60% no PCI
33% PCI
Reduction in lung cancer specific mortality with low dose CT annually
20%
What proportion of NSCLC has EGFR mutation
10%
What subtypes more likely to spread to brain?
adenocarcinoma, large cell
PET false negative rate for mediastinum
10%
Chamberlain procedure is needed to sample which stations
5, 6
Can also get 4, 7
Level 5 nodes aka
AP window
Optimal treatment of stage I NSCLC
lobectomy
MLND
Can consider SBRT for lesions < X mm
5
Which factors are utilized to determine if patient is surgical candidate
FEV1
DLCO
5 year OS with surgery alone for stage I
80%
RTOG 0236 for peripheral tumors dose
20 x 3 to PTV but was actually 18 x 3
What was the local control on 0236
90% ar 3 years, 80% at 5 years
What was OS at 3 years for this study
55%
What was GTV expansion on 0236
1 cm craniocaudal, 0.5 cm radially unless 4D and image guidance in which case 0.5 cm circumferentially
SPACE trial
Randomized patients to
- 66 / 3 SBRT
- 70 / 35 3DCRT
Results of SPACE
no diff in OS
Trend towards improved LC, higher QOL with SBRT
pCR rate 10 weeks after SBRT
60%
PORT meta analysis OS
7% survival DECREASE with PORT
PORT meta analysis locoregional failure
24% decrease in LRR with PORT
Possible explanation of PORT metaanalysi
Old techniques (Co)
Weird fractionations
Early stage patients included
SEER Data suggests PORT may be advantageous for pts with
pN2
ANITA analysis
pN1 - harmed by adjuvant RT (unless no chemo)
pN2 - benefit
Chemo regimens for adenocarcinoma
- Cis/Pemetrexed
2. Carbo/Taxol +/- Bev
Chemo regimen for SCC
cis/etoposide
When should adjuvant chemo be given
stage I - maybe if >4 cm
stage II/III yes
Mgmt of superior sulcus tumors
ChemoRT –> surgical resection
SWOG 9416 trial design
2 cycles of cis-etoposide –> 45 Gy / 1.8 Gy
Additional RT to 60 Gy if unresectable
What patients were included on Pancoast trial
T3-T4
N0-1
What percentage of patients underwent surgery
80%
What were the surgical advantages of preop CRT
94% R0
29% CR
36% minimal microscopic residual
Auperin meta analysis for locally advanced concluded that concurrent CRT had X% OS advantage
5%
RTOG 0617
RCT of two dosing schedules
- 60/30
- 74/37
What chemo was used on 0617
Concurrent weekly carbo-taxol
Carbo AUC 2
Taxol 45 mg/2
then consolidation carbo-taxol
Heart constraint on 0617
V60 < 1/3
What heart dosimetric metric was identified as prognostic
Cardiac V50
V40 as well
Findings of 0617
high dose associated with poorer survival and control
Benefit of IMRT on 0617
IMRT had less G3+ pneumonitis
Associated with lower heart dose
Factors associated with improved OS on 0617
60 Gy Smaller PTV volume Lower heart V5 Max esophagitis grade Higher institutional accrual Non-LLL or central location
PACIFIC trial design
ChemoRT to 60 Gy
Randomized to get durvalumab q2w for up to a year
When do patients start durvalumab
1-42 days post CRT
12 month PFS benefit for durva
durva: 55%
placebo: 35%
Other endpoints improved with durva
Response rate
Duration of response
Time to death or distant mets
Preferred systemic therapy option for M1 disease
PDL1 > 50% - pembro
PDL1 < 50% - chemo+pembro
RTOG 0937 [PCI + PCI + consolidative RT to intrathoracic/extracranial mets for ES-SCLC] dose to thoracic/extracranial disease
45 Gy in 15
RTOG 0937 [PCI + PCI + consolidative RT to intrathoracic/extracranial mets for ES-SCLC] OS findings
No difference at 1 year [60% vs. 51%, NSS]
But oligometastatic ES-SCLC outcomes similar to LS-SCLC
RTOG 0937 [PCI + PCI + consolidative RT to intrathoracic/extracranial mets for ES-SCLC] time to progression
Favored consolidation arm and most pts on PCI only arm failed in initially involved sites
How was CONVERT trial designed?
To show superiority of 66 Gy QD vs. 45 BID
How many cycles of chemo on CONVERT?
4-6 cycles of cis-etoposide q3w
When did RT start on CONVERT
day 22 (with cycle 2)
Design of RTOG 0617
2x2 factorial study randomized to
- 60 Gy
- 74 Gy
- 60 Gy + Cetuximab
- 74 Gy + Cetuximab
Patients included on 0617
Unresectable stage III, no SCV or contralateral hilar nodes
Chemo used on 0617
concurrent and adjuvant
concurrent carbo (AUC 2) and paclitaxel (45 mg/m2) weekly
adjuvant 2 cycles of carbo (AUC 6) and paclitaxel (200 mg/m2) q3w
Dose of cetuximab on 0617
400 mg/m2 (day 1) –> 250 (weekly)
Median OS for 60 Gy arm
29 months
Median OS for 74 Gy arm
20 months
Median OS for cetux vs. no cetux
25 vs. 24 months (NSS)
1 year LF for 60 vs 74 Gy arm
16% vs. 25% (NSS)
0617 differences in toxicity by dose
No differences between G3+ by dose level
0617 differences in toxicity by cetux/no cetux
86% for cetux vs. 70% for no cetux
What tox was worse with 74 Gy
severe esophagitis
From 0617 factors associated with OS
- 60 Gy
- Max esophagitis grade
- PTV size
- Heart V5 and V30
AP/PA field border for hemithoracic RT for meso - superior
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