Diagnostic imaging and pathogenesis of the traumatic intratumoural haemorrhage of schwannoma causing acute high radial nerve palsy: case report.

We describe the first report of haemorrhaged schwannoma presenting with acute high radial nerve palsy after traumatic injury of the upper arm. Anticoagulant therapy may induce intratumoural haemorrhage, resulting in symptomatic increases in size within the limited space of the upper arm. The radiological, surgical and pathological findings are discussed.