KIT and gastrointestinal stromal tumor: The results of the immunohistochemical assay indicated that six of the eleven KITMAbs (1-Ab, 3-Ab, 4-Ab, 6-Ab, 7-Ab, and 8-Ab) bound to KIT proteins in all the GIST tissues optimally, and the positive colour rendering was located in the cytoplasm or membrane of the GIST cells (Fig. 1a).