Fig. 2

Masson’s trichrome staining of a section of a mandibular osteosarcoma developed in C57Bl/6 mouse (MOS-J model) in a frontal view (left, original magnification (OM)). Large tumor (T) developed in contact with left mandibular bone (MB) (right, OM × 5). High density of osteoblastic tumor cells secreting osteoïd substance (window, OM × 20)