Complete response after 8 weeks of larotrectinib (200 mg/day) treatment in November 2019. No lesions with 18F‐FDG uptake were observed during the PET/CT scan. 18 F‐FDG, 2‐deoxy‐2‐[fluorine‐18] fluoro‐D‐glucose; PET/CT, positron emission tomography/computed tomography 