Differential expression of Runx2 in conventional chondrosarcoma and dedifferentiated chondrosarcoma

Abstract

Objective To detect the differential expression of Runx2 in the conventional chondrosarcoma and dedifferentiated chondrosarcoma, and study the role and significance of Runx2 in the dedifferentiation of chondrosarcoma. Methods The expression of Runx2 in 42 cases of chondrosarcoma (20 cases of conventional chondrosarcoma, and 22 cases of dedifferentiated chondrosarcoma) was detected by using immunohistochemistry SP method. Results The positive expression rate of Runx2 in conventional chondrosarcoma was 10%, which was significantly lower than in dedifferentiated chondrosarcoma (95.5%). Conclusion Runx2 is up-regulated in dedifferentiated chondrosarcomas, suggesting Runx2 may involve in the occurrence and development of dedifferentiated chondrosarcoma. Key words: Chondrosarcoma; Dedifferentiated chondrosarcoma; Runx2; Immunohistochemistry