Supplementary Figure 1 from Dacarbazine in Solitary Fibrous Tumor: A Case Series Analysis and Preclinical Evidence vis-à-vis Temozolomide and Antiangiogenics

PDF file, 256K, A Human primary tumor: morphology (i.e., patternless growth, collagen deposition, moderate cellularity, mitotic index (>4X10 High Power Field (HPF), as shown in panel 1) and immunophenotype (i.e., diffuse positivity for CD34, as shown in panel 1/a) were consistent with a malignant SFT. Immunohistochemistry was positive for PDGFRB expression (panel 1/b). B Human relapsed tumor: morphology was consistent with a dedifferentiated SFT (DSFT), being marked by the abrupt transition from areas with MSFT aspects similar to what observed in the primary tumor (panel 2) to areas with high-grade sarcoma features (panel 3). High-grade areas showed hypercellularity (panel 3/a), chondroid (panel 3/b) and osteoid differentiation (panel 3/c). C Xenograft tumor: morphology was consistent with a high-grade DSFT (panel 4), superimposable to what observed in panel B, 3a/3b/3c, again with presence of mineralized trabeculaes and osteoid (panel 4/a). Immunohistochemistry was positive for PDGFRB expression (panel 4/b). Phospho receptor tyrosine kinase (pRTK) array (ARY001 Proteome ProfilerTM Array, R&D Systems) showed similar profiles for human relapsed tumor (panel B, 3/d) and xenograft (panel C, 4/c) with the activation of PDGFRA (green boxes), PDGFRB (red boxes) and VEGFR1 (yellow boxes). White boxes are the proteome profiler negative controls.