Eric K. Singhi, MD
@lungoncdoc · Jul 21, 2026 · 3 slides
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#BTGLung2026 kicks off with small cell lung cancer...
What's known, and what may be changing?
1. Tarlatamab is our preferred 2L option.
2. ADCs are emerging.
3. Will our 1L treatment for ES-SCLC change?
@OncLive @drshieldsmd @NarjustFlorezMD @DrEdKim
DeLLphi-304
What is known: tarlatamab is the preferred SOC 2L therapy
Eric K. Singhi, MD
What is known: tarlatamab is the preferred SOC 2L therapy
Improved Survival | Higher response rate | Favorable safety profile
[KM curve — Overall Survival]
HR 0.60, p<0.001
mOS 13.6 (11.1- NR) — Tarlatamab
mOS 8.3 (7.0-10.2) — Chemotherapy
Percentage of Patients vs Months since Randomization (0-21)
No. at Risk
Tarlatamab 254 220 192 131 60 17 0
Chemotherapy 255 210 156 97 42 9 2 0
[Response table]
Tarlatamab (n = 254) Chemotherapy (n = 255)
Best overall response*t, n (%)
Complete response 3 (1) 0 (0)
Partial response 86 (34) 52 (20)
Stable disease 84 (33) 112 (44)
Progressive disease 56 (22) 50 (20)
Not evaluable/no post-baseline scan 25 (10) 41 (16)
Objective response rate:, % (95% CI) 35 (29-41) 20 (16-26)
Median duration of response, months 6.9 5.5
Median time to objective response, months 1.5 1.4
Ongoing response at data cutoff, n§ (%) 42 (47) 8 (15)
[Safety table]
Tarlatamab (n = 252)* Chemotherapy (n = 244)*
Median duration of treatment, months, (range) 4.2 (< 1-17) 2.5 (< 1-15)
All grade, TEAEs, n (%) 249 (99) 243 (100)
All grade, TRAEs n (%) 235 (93) 223 (91)
Grade ≥ 3 TRAEs, n (%) 67 (27) 152 (62)
Serious TRAEs, n (%) 70 (28) 75 (31)
TRAEs leading to dose interruption and/or dose reduction, n (%) 48 (19) 134 (55)
TRAEs leading to discontinuation, n (%) 7 (3) 15 (6)
Treatment-related grade 5 events†, n (%) 1 (0.4) 4 (2)
Rudin et al, ASCO 2025
Mountzios et al, NEJM 2025
Rudin et al, ASCO 2025; Mountzios et al, NEJM 2025
Cross-trial ADC table (SCLC)
ADCs are emerging key players in SCLC
Eric K. Singhi, MD
ADCs are emerging key players in SCLC
ADC Trial / Phase ORR mPFS (mo) mOS (mo)
Ifinatamab Deruxtecan¹ B7-H3 IDeate-Lung01 Phase II 48% 4.9 10.3
Sacituzumab Govitecan² TROP2 TROPiCS-03 Phase II 42% 4.4 13.6
ABBV-706³ SEZ6 NCT05599984 Phase I 52% 5.4 11.3
Zocilurtatug pelitecan⁴ DLL3 NCT06179069 Phase I 47% 5.4 -
Encouraging results in later-line setting
Is there a role for ADCs in earlier treatment settings?
¹Rudin et al, JCO 2025
²Dowlati et al, ASCO 2026
³Byers et al, Nature Med 2026
⁴Patel et al, ASCO 2025
1 Rudin et al, JCO 2025; 2 Dowlati et al, ASCO 2026; 3 Byers et al, Nature Med 2026; 4 Patel et al, ASCO 2025
1L ES-SCLC landscape
The unknown: What is optimal 1L therapy in ES-SCLC?
Eric K. Singhi, MD
The unknown: What is optimal 1L therapy in ES-SCLC?
Standard of care: Platinum / Etoposide / ICI
60-70% response rate
+ Additive
BiTE Obrixtamig (DAREON-Lung-1) Tarlatamab (DeLLphi-312)
VEGFi Ivonescimab (PD-L1 x VEGF) BNT327 (PD-L1 x VEGF) PF-08634404 (PD-1 x VEGF)
Other BMS-986489 (Anti-fucosyl-GM1 antibody + nivolumab)
Replacement
+/- Carboplatin
I-DXd OR ABBV-706 OR ZL-1310
Atezolizumab
IDeate-Lung03
SEZanne
NCT06179069
IDeate-Lung03; SEZanne; NCT06179069