Kantonsspital St.Gallen

A popliteal giant synovial osteochondroma mimicking a parosteal osteosarcoma

Andreas Toepfer, Florian Pohlig, Heinrich Mühlhofer, Florian Lenze, Rüdiger Von Eisenhart-Rothe & Ulrich Lenze

abstract Both giant synovial osteochondroma and parosteal osteosarcoma are rare musculo-skeletal tumors, often localized in the vicinity of the knee. Misdiagnosis of a malignant bone tumor can entail fatal consequences. Etiology of giant synovial osteochondroma is widely unsolved but is believed to originate from synovial chondromatosis, a mostly benign metaplasia of the synovial membrane. Parosteal osteosarcoma is a low-grade surface osteosarcoma with a propensity of local recurrence and the potential of distant metastasis and therefore requiring a different therapeutical approach. We report the case of a popliteal giant osteochondroma mimicking a parosteal osteosarcoma. Relevant facts of this rare entity regarding pathogenesis, treatment, and differential diagnoses will be discussed.
citation Toepfer A, Pohlig F, Mühlhofer H, Lenze F, von Eisenhart-Rothe R, Lenze U. A popliteal giant synovial osteochondroma mimicking a parosteal osteosarcoma. World J Surg Oncol 2013; 11:241.
type journal paper/review (English)
date of publishing 25-09-2013
journal title World J Surg Oncol (11)
ISSN electronic 1477-7819
pages 241
PubMed 24066980
DOI 10.1186/1477-7819-11-241