Figure 3From: Characterization and assessment of the sensitivity and resistance of a newly established human gastrointestinal stromal tumour xenograft model to treatment with tyrosine kinase inhibitorsAssessment of histologic response of UZLX-GIST9 during treatment with different TKIs. Histologic response was graded by assessing the magnitude of necrosis, myxoid degeneration, and/or fibrosis on H & E staining: grade 1 (0%–10%), grade 2 (>10% and ≤50%), grade 3 (>50% and ≤90%), and grade 4 (>90%)[24, 25].Back to article page