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  Indian J Med Microbiol
 

Figure 2: (a) Chondroid areas (arrow head), mononuclear cellular areas (thick arrow), and aneurysmal bone cyst like areas (black stars) (H and E, ×10). (b) Mononuclear cellular areas merging with chondroid areas, with multinucleated giant cells (thin arrows) and foci of calcification and ossification (arrow head) (H and E, ×40). (c) Chondroblastic foci showing mononuclear cells with distinct cell margins, vacuolated cytoplasm (H and E, ×40). (d) S-100 immunostain positivity (×100). (e) Characteristic "chicken wire" calcification around each cell in reticulin stain preparation (×40)

Figure 2: (a) Chondroid areas (arrow head), mononuclear cellular areas (thick arrow), and aneurysmal bone cyst like areas (black stars) (H and E, ×10). (b) Mononuclear cellular areas merging with chondroid areas, with multinucleated giant cells (thin arrows) and foci of calcification and ossification (arrow head) (H and E, ×40). (c) Chondroblastic foci showing mononuclear cells with distinct cell margins, vacuolated cytoplasm (H and E, ×40). (d) S-100 immunostain positivity (×100). (e) Characteristic