MMP9 and chondrosarcoma: Similar to OS and ES, the expression of MMPs such as MMP-1 [65,89,90,91,92], MMP-2 [93,94,95], MMP-3 [89,95], MMP-7 [95,96], MMP-9 [89,94,95], and MMP-14 [93] is also found in biopsy specimens from patients with chondrosarcoma.