Answer for BIR CoW 16 Nov 2025
Osteofibrous dysplasia of Campanacci
Findings
Imaging depicts an intracortical, eccentrically expansive, predominantly lytic lesion with a marginal band of sclerosis involving the diaphysis of anterior tibial cortex. Minimal anterior tibial bowing seen. No invasion of the nearby soft tissues was observed. The medullary bone marrow surrounding the lesion was normal.
Discussion
Osteofibrous dysplasia (occasionally referred to as ossifying fibroma of the tubular bones) is a benign fibroosseous lesion most commonly found in the anterior tibial cortex of young children . The tumor is usually identified in children during the first decade more often than the second decade of life. The lesion is rare after 15 years of age. Clinically, patients present with enlargement of the tibia and slight anterior bowing. the lesion is often painless but is prone to pathologic fracture. Differentiation from adamantinoma and fibrous dysplasia is sometimes difficult. Fibrous dysplasia is usually intramedullary.The absence of intramedullary extension aids in differentiation from adamantinoma.
References
Imaging of Bone Tumors and Tumor-Like Lesions, Techniques and Applications by A. M. Davies ∙ M. Sundaram ∙ S. L. J. James.
Findings
Imaging depicts an intracortical, eccentrically expansive, predominantly lytic lesion with a marginal band of sclerosis involving the diaphysis of anterior tibial cortex. Minimal anterior tibial bowing seen. No invasion of the nearby soft tissues was observed. The medullary bone marrow surrounding the lesion was normal.
Discussion
Osteofibrous dysplasia (occasionally referred to as ossifying fibroma of the tubular bones) is a benign fibroosseous lesion most commonly found in the anterior tibial cortex of young children . The tumor is usually identified in children during the first decade more often than the second decade of life. The lesion is rare after 15 years of age. Clinically, patients present with enlargement of the tibia and slight anterior bowing. the lesion is often painless but is prone to pathologic fracture. Differentiation from adamantinoma and fibrous dysplasia is sometimes difficult. Fibrous dysplasia is usually intramedullary.The absence of intramedullary extension aids in differentiation from adamantinoma.
References
Imaging of Bone Tumors and Tumor-Like Lesions, Techniques and Applications by A. M. Davies ∙ M. Sundaram ∙ S. L. J. James.
Note:
We do not discourage differential diagnosis. But all the differentials must satisfy the findings noted in the case.
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We do not discourage differential diagnosis. But all the differentials must satisfy the findings noted in the case.
If you feel you have answered rightly but cannot find your name in the above list, please call 09551942599.
Did you Know?
The order in which the names appear in this winner's list is based on the time of submission. The first person to send the correct answer gets his/her name on top of the list!