PDGFRA and neoplasm: By contrast, tumor size in Group A patients was greater (10.1 ± 5.8 cm) than in Group B (4.7 ± 1.9 cm; p = 0.0002), whereas the frequency of the WT status for both KIT and PDGFRA was lower in Group A than B (14.3 % vs. 50 %; p = 0.009).