Specifically, the mean OS was longer for patients with higher VAF in both the overall cohort and in subgroups with EGFR exon 19 deletions and exon 21 L858R mutations. These findings suggest that VAF could serve as a valuable predictive biomarker for treatment outcomes in EGFR-mutated NSCLC patients, highlighting its potential role in personalizing treatment strategies.
EGFR mutation status, brain metastases, and clinical response are key predictors of survival in NSCLC patients. Integrating genetic screening, timely management of brain metastases, and early assessment may enhance personalized treatment and improve prognosis.
This case represents the first documented instance of primary gliosarcoma with FDCS differentiation, thereby expanding its known differentiation spectrum. Furthermore, it demonstrates the necessity of separately analyzing each histological component in the diagnosis of challenging cases.