Morphological Subtypes (GSRCB*) 100% 129 90% 80% epithelioid 227 70% 60% mixed 50% (intermediate 40% or biphasic) 30% 644 20% 10% spindle cell 0% 2010 spindle amixed epithelioid n=1614 Corless cl et al. Annu Rev Patho. 2008: 3: 557-586 Fletcher cD et al. Hum Pathol 2002: 33: 459-456 Wardelmann E et al. J Mol Diagn. 2004: 6: 197-204 GSRCB: GIST and Sarcoma Registry Cologn e/Bonn