Expert’s comment concerning Grand Rounds case entitled “Aneurysmal bone cyst of C2 treated with novel anterior reconstruction and stabilization” by S. Rajasekaran et al. (Eur Spine J; 2016: DOI 10.1007/s00586-016-4518-0)

[摘要] Aneurysmal bone cyst (ABC) is a benign bone tumor. Only recently, the neoplastic nature of this disease has been demonstrated [1] concluding speculations about a presumptive hyperplastic nature of this disease, based on slow growing cases, sometimes self-limited cases [2], reported as well as cases of fast and locally aggressive (but never infltrative) behavior [3].