Figure 1 :Lateral radiograph of distal portion of femur shows osteosarcoma with amorphous tumor-induced new bone formation (black arrows). Note the large soft-tissue mass (white arrows) that displaces adjacent fat. 
Figure 2 :Buttress periosteal reaction. (a) Diagram shows beaklike solid periosteal buttress formation (arrow). (Adapted and reprinted, with permission, from reference 2.) (b) Anteroposterior radiograph of humerus in a patient with periosteal chondrosarcoma shows periosteal buttress (short white arrow). Note well-defined saucerization of humeral shaft (black arrows) and faint mineralization of the matrix (long white arrow).
Figure 2 :Buttress periosteal reaction. (a) Diagram shows beaklike solid periosteal buttress formation (arrow). (Adapted and reprinted, with permission, from reference 2.) (b) Anteroposterior radiograph of humerus in a patient with periosteal chondrosarcoma shows periosteal buttress (short white arrow). Note well-defined saucerization of humeral shaft (black arrows) and faint mineralization of the matrix (long white arrow). A)
B)
Figure 3: Codman triangle. (a) Diagram shows elevated periosteum (arrow) forming an angle with the cortex. (b) Lateral radiograph in patient with osteosarcoma shows the elevated periosteum forming Codman triangle (long arrow). Notice the tumor-induced new bone formation (short arrows.)
B)
Figure 3: Codman triangle. (a) Diagram shows elevated periosteum (arrow) forming an angle with the cortex. (b) Lateral radiograph in patient with osteosarcoma shows the elevated periosteum forming Codman triangle (long arrow). Notice the tumor-induced new bone formation (short arrows.)
B)
A)
Figure 4 :Perpendicular periosteal reaction. (a) Diagram shows spiculated, or hair-on-end, periosteal reaction (arrow). (b) Diagram shows radial, or sunburst, periosteal reaction (arrow).(c) Anteroposterior radiograph in patient with osteosarcoma shows marked perpendicular periosteal reaction in proximal portion of femur.
C)
B)
A)
Figure 5 :Multilamellated periosteal reaction. (a) Diagram shows multilamellated, or onionskin, periosteal reaction (arrow). (b) Anteroposterior radiograph in a patient with osteosarcoma shows multilamellated periosteal reaction (arrow) in proximal portion of femur. Note also large surrounding soft-tissue mass.B)
A)
Figure 6 :Unilamellated periosteal reaction. (a) Diagram shows single layer of reactive periosteum (arrow). (b) Anteroposterior radiograph of the knee in patient with hypertrophic osteoarthropathy shows thick unilamellated periosteal reaction
B)
A)
Figure 7 : Type 1a geographic lesion .
Figure 8 : Type 1b geographic lesion.
Figure 9 : Type 1c geographic lesion.
Figure 10: Type 2 Moth Eaten lesion .
Figure 11 : Type 3 Permeative lesion.
Table 1 : Soap bubble lesions.
Table 2 : Bone tumors sites.
Table 3 : Bone tumors location.
Table 4 : Multiple bone lesions.
Table 5 : Sequestral lesions .
Figure 12 : Common location of bone tumors.
Figure 13 :
Table 6 : Moth eaten bone lesions.
Table 7 : Bone tumors and age
A)
Figure 6 :Unilamellated periosteal reaction. (a) Diagram shows single layer of reactive periosteum (arrow). (b) Anteroposterior radiograph of the knee in patient with hypertrophic osteoarthropathy shows thick unilamellated periosteal reactionB)
A)
Figure 7 : Type 1a geographic lesion .
Figure 8 : Type 1b geographic lesion.
Figure 9 : Type 1c geographic lesion.
Figure 10: Type 2 Moth Eaten lesion . Figure 11 : Type 3 Permeative lesion.
Table 1 : Soap bubble lesions.
Table 2 : Bone tumors sites.
Table 3 : Bone tumors location.
Table 4 : Multiple bone lesions.
Table 5 : Sequestral lesions .
Figure 12 : Common location of bone tumors.
Figure 13 : 
Table 6 : Moth eaten bone lesions.
Table 7 : Bone tumors and age
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