Recent studies have focused on novel treatments for small cell lung cancer (SCLC), particularly in the context of extensive-stage disease. A phase 3 trial demonstrated that tarlatamab, a bispecific T-cell engager, significantly improved overall survival compared to traditional chemotherapy in patients whose disease progressed after platinum-based treatments (ref: Mountzios doi.org/10.1056/NEJMoa2502099/). Additionally, the IMforte trial revealed that combining lurbinectedin with atezolizumab as first-line maintenance therapy resulted in longer progression-free survival and overall survival compared to atezolizumab alone, despite a higher incidence of adverse events (ref: Paz-Ares doi.org/10.1016/S0140-6736(25)01011-6/). Furthermore, the CATS study explored the potential of circulating free DNA (cfDNA) and tumor fraction as biomarkers to predict clinical outcomes in patients treated with atezolizumab and chemotherapy, highlighting the importance of molecular monitoring in SCLC management (ref: Pasello doi.org/10.1186/s13046-025-03434-3/). These findings underscore the shift towards personalized treatment strategies in SCLC, emphasizing the need for ongoing research into biomarkers and combination therapies to enhance patient outcomes.