Assessment of ARX expression, a novel biomarker for metastatic risk in pancreatic neuroendocrine tumors, in endoscopic ultrasound fine-needle aspiration. - Hackeng WM; Morsink FHM; Moons LMG; Heaphy CM; Offerhaus GJA; Dreijerink KMA; Brosens LAA (Diagnostic cytopathology, 2020)