Segmentation by type classifies treatments into chemotherapy, targeted therapy, immunotherapy, and cellular therapy, each further divided into sub‑modalities. Chemotherapy includes conventional alkylating agents and nucleoside analogues, which retain a modest market share due to limited efficacy and toxicity concerns. Targeted therapy comprises monoclonal antibodies (e.g., mogamulizumab), small‑molecule inhibitors (e.g., lenalidomide), and epigenetic modulators, accounting for the fastest‑growing portion of the market as precision‑medicine gains regulatory approval. Immunotherapy spans checkpoint inhibitors (PD‑1/PD‑L1 blockers) and vaccine‑based approaches, contributing incremental revenue driven by ongoing trials and expanding indication scopes. Cellular therapy, principally CAR‑T cell products, remains an emerging segment with high per‑patient cost but significant potential to reshape treatment algorithms for refractory disease. The relative contribution of each type to the overall market size reflects clinical efficacy, safety profile, and payer acceptance, establishing a nuanced market taxonomy that guides investment and development priorities.