Osteochondroma is the most common benign bone tumor. However, intracranial osteochondroma is very rare, which usually arises from the skull base. Origination from the dura and falx occurs only in sporadical cases. To our knowledge, only twelve cases have been reported in English literature. We report a case of giant osteochondroma from the falx cerebri causing external compression on the brain. Radiographic findings, computed tomography and magnetic resonance imaging manifestation with histologic correlation are described.
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