Tartrate-resistant acid phosphatase (TRAP) staining of a sagittal section of the resected mass. A; No TRAP-positive osteoclasts could be seen around the new bone or the cavity (scale bar, 500μm). B; Bone tip harvested from a spinous process during the corrective surgery was used as a positive control. Some TRAP-positive osteoclasts were observed (arrow heads).
Inoue et al. Diagnostic Pathology 2012 7:153 doi:10.1186/1746-1596-7-153