Recent advancements in genomic and molecular profiling have significantly enhanced our understanding of cancer biology and treatment. A notable study developed wellDR-seq, a high-throughput method that allows simultaneous profiling of the genome and transcriptome of thousands of single cells. This approach was applied to 33,646 single cells from estrogen-receptor-positive breast cancers, revealing ancestral subclones with a luminal hormone-responsive lineage, suggesting a potential cell of origin for breast cancer (ref: Wang doi.org/10.1016/j.cell.2025.08.012/). In another study, HT SpaceM was introduced as a high-throughput metabolomics method that improves the detection of small-molecule metabolites, addressing previous limitations in single-cell metabolomics (ref: Delafiori doi.org/10.1016/j.cell.2025.08.015/). Furthermore, research into non-small cell lung cancer (NSCLC) demonstrated that aberrant DNA methylation interacts with genomic alterations during tumor evolution, providing insights into the complexity of cancer progression (ref: Gimeno-Valiente doi.org/10.1038/s41588-025-02307-x/). These studies collectively highlight the importance of integrating genomic and transcriptomic data to unravel the complexities of cancer evolution and treatment responses. Moreover, the characterization of small-cell lung cancer (SCLC) through multiomics analyses revealed high intratumor heterogeneity and identified specific oncogenic mutations, which may guide future therapeutic strategies (ref: Wang doi.org/10.1038/s41392-025-02378-6/). The interplay of genomic alterations and epigenetic modifications, such as DNA methylation, underscores the need for comprehensive profiling to inform precision medicine approaches. Overall, these findings emphasize the critical role of advanced genomic techniques in elucidating cancer mechanisms and improving therapeutic outcomes.