1. Focus on sarcomas Cancer Cell
Crystal L Mackall, Paul S Meltzer, Lee J Helman 
Cancer Cell 
Volume 2, Issue 3, Pages (September 2002)
DOI: /S (02)

2. Figure 1
Schematic model for differentiation of mesenchymal tissues and sarcoma tumorigenesis
Boxes represent progenitor cells for each lineage shown. Solid lines designate normal differentiation and dotted lines represent potential pathways for sarcoma tumorigenesis. For some sarcomas (e.g., MPNST, SS, and Ewing's), the exact lineage remains unknown. ICC = interstitial cells of Cajal.
Cancer Cell 2002 2, DOI: ( /S (02) )