Acute orbital myositis: a case report.

A case of acute orbital myositis is presented in this report. CT scanning provided an immediate diagnosis and hence institution of treatment. There was a typically rapid response to steroids. A previous presentation, prior to the advent of CT, had been misdiagnosed as Tolosa-Hunt syndrome. Orbital pseudotumour can be acute or chronic, and acute orbital myositis is now regarded as one of five subtypes of the former.