Klinik für Orthopädie und Sportorthopädie, Klinikum rechts der Isar der Technischen Universität München, Ismaningerstr, 22, 81675 Munich, Germany.
World J Surg Oncol. 2013 Sep 25;11:241. doi: 10.1186/1477-7819-11-241.
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.
滑膜骨软骨瘤病和骨旁骨肉瘤均为罕见的肌肉骨骼肿瘤，常发生于膝关节附近。恶性骨肿瘤的误诊可能导致致命后果。滑膜骨软骨瘤病的病因尚不完全清楚，但被认为起源于滑膜软骨瘤病，这是一种滑膜的良性化生。骨旁骨肉瘤是一种低度恶性的表面骨肉瘤，具有局部复发的倾向，并有远处转移的可能，因此需要不同的治疗方法。我们报告了一例酷似骨旁骨肉瘤的腘窝巨大骨软骨瘤。将讨论该罕见实体的发病机制、治疗和鉴别诊断的相关事实。
