Chondrosarcoma cell morphology and proliferation. a) JJ012 demonstrated high pleomorphism and nuclear atypia with prominent nucleoli. b) FS090 had more distinct polarity and less nuclear atypia. c) JJ012 proliferated at a higher rate than FS090 (*p < 0.05). d) Prominent colony formation was noted for JJ012 suspended in collagen I gel. e) FS090 did not form colonies after 5 days.