Gastrointestinal stromal tumours (GISTs) are rare malignancies arising along the gastrointestinal tract. Tyrosine kinase inhibitors (TKIs) have substantially improved survival for patients with unresectable or metastatic GIST. As a result, an increasing number of patients live with advanced disease under chronic TKI therapy, highlighting the need to understand long-term survivorship, including health-related quality of life (HRQoL), treatment burden, and clinical outcomes.
This international, multicentre observational study includes two components: a retrospective cross-sectional study to evaluate the relevance and applicability of patient-reported outcome instruments, and a prospective cohort to document long-term clinical outcomes, HRQoL, treatment patterns, and survivorship challenges.
Participants will include adults with advanced or metastatic GIST who have received TKI therapy for at least 2 years. Data will be collected from medical records and through validated patient-reported outcome questionnaires at baseline and annually for up to 10 years. This study aims to provide insight into HRQoL problems, treatment discontinuation, coping strategies, and the impact of financial toxicity among long-term survivors of GIST.