We compared mutation spectra, pathway enrichment, tumor mutation burden (TMB), microsatellite instability (MSI), and survival outcomes between age groups.<h4>Results</h4>Across both cohorts, PTEN, PIK3CA, and ARID1A were the most frequently mutated genes, forming a conserved oncogenic core centered on PI3K/AKT signaling and chromatin remodeling. The gene discussed is PIK3CA; the disease is neoplasm.