Application-based market taxonomy distinguishes first-line, second-line, and maintenance/regimens. First-line therapy dominates value, capturing roughly 55 % of 2023 global sales; patients are treatment-naรฏve, performance-status eligible, and remain on therapy longest, so pharmaceutical companies embed volume-based contracting here to secure formulary positioning. Second-line use, around 30 % of spend, is fragmented across multiple single-agent or combination protocols, with prescribers balancing modest survival benefit versus toxicity; consequently, uptake of newer entrants (e.g., liposomal irinotecan) is highly dependent on overall-survival differentials and post-progression sequencing logic. Maintenance or switch-maintenance, about 15 % of the market, is emerging as firms explore low-dose targeted regimens after induction chemotherapy; although currently small, this niche is attractive because treatment duration is extended, patient compliance is higher, and payer scrutiny is lighter, offering manufacturers a leverage point to defend pricing in an indication where reimbursement resistance is intensifying.