Document Type


Journal Title

World journal of surgical oncology

Publication Date

Winter 1-20-2014




Aneurysmal bone cyst (ABC), once considered a reactive lesion, has been proven to be a neoplasia characterized by rearrangements of the USP6-gene. Aggressive local growth and recurrences are common and therapeutic options may be limited due to the vicinity of crucial structures. We describe a case of a locally aggressive, multinucleated giant cell-containing lesion of the forearm of a 21-year old woman, treated with denosumab for recurrent, surgically uncontrollable disease. Under the influence of this RANKL inhibitor, the tumor showed a marked reduction of the content of the osteoclastic giant cells and an extensive metaplastic osteoid production leading to the bony containment, mostly located intracortically in the proximal radius. The diagnosis of a periosteal ABC was confirmed by FISH demonstrating USP6 gene rearrangement on the initial biopsy. Function conserving surgery could be performed, enabling reconstruction of the affected bone. Inhibition of RANKL with denosumab may offer therapeutic option for patients not only with giant cell tumors but also with ABCs.

MeSH Headings

Adult, Antibodies, Monoclonal, Humanized, Bone Cysts, Aneurysmal, Bone Neoplasms, Denosumab, Female, Humans, In Situ Hybridization, Fluorescence, Periosteum, Prognosis, Proto-Oncogene Proteins, RANK Ligand, Radius, Ubiquitin Thiolesterase, Young Adult




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