Clinical meaning
Palliative chemotherapy is the administration of cytotoxic or targeted antineoplastic agents with the explicit goal of improving quality of life, managing symptoms, and potentially extending survival in patients with advanced or metastatic cancer that is not curable. This stands in contrast to curative chemotherapy, where the intent is to eliminate the cancer entirely and achieve long-term remission or cure. Understanding this distinction is fundamental because it changes the entire framework of care: in curative treatment, significant toxicity may be acceptable because the endpoint is cure; in palliative treatment, the benefit of tumor shrinkage must be weighed against the burden of treatment side effects, and the primary goal shifts from tumor eradication to comfort and quality of life. Chemotherapy works by interfering with cellular division and DNA replication. Because cancer cells divide more rapidly and uncontrollably than most normal cells, they are preferentially affected by chemotherapy. However, normal cells with high turnover rates are also damaged, producing the well-known side effects: bone marrow suppression (neutropenia, anemia, thrombocytopenia from damage to hematopoietic stem cells), mucositis and stomatitis (damage to rapidly dividing mucosal...