A Phase 2 Study of Imatinib Therapeutic Drug Monitoring in Gastrointestinal Stromal Tumor
Imatinib can lead to long recurrence free survival in patients diagnosed with gastrointestinal stromal tumors (GIST); however side effects can significantly hinder quality of life for our patients. This study will use therapeutic drug monitoring to improve quality of life and symptoms and assess how many patients maintain therapeutic levels. Free drug levels and pharmokinetics of imatinib will also be monitored.
• Histologically or cytologically confirmed GIST with KIT mutation or PDGFRA mutation (non-D842V)
• Currently receiving imatinib initiated within the last 3 months or to be started in the next 1 month
• Prior systemic chemotherapy for other malignancy is allowed as long as it was completed within the past 6 months and there is no evidence of disease
• Age ≥18 years
• ECOG performance status of 0 or 1
• Normal organ function