Which Goals Should We Pursue in Each Line of Treatment For Advanced Soft Tissue Sarcoma?

Treatment goals for advanced soft tissue sarcoma (STS) vary according to disease stage and treatment line. In potentially resectable advanced disease, the goal of treatment is tumor shrinkage to facilitate surgical resection with better margins. Doxorubicin in combination with ifosfamide (or dacarbazine) is first-line therapy of choice in this setting. Tumor shrinkage is relevant not only for surgical rescue but also to obtain rapid symptomatic relief related to tumor volume. Doxorubicin monotherapy can be selected as first-line therapy in cases where disease control with less morbidity is the objective. Second-line therapy for metastatic disease generally aims for disease stabilization with good quality of life although, in some palliative or potentially resectable cases, tumor shrinkage may be relevant. To date, treatment aim has not been a critical factor in the design of clinical trials in advanced STS. In clinical practice, however, treatment is selected according to aim. Future clinical trials in patients with advanced STS should take treatment goals into account. Using illustrative case studies, evidence is examined which supports the current approach to treatment of advanced STS.