Superior orbital fissure asymmetry

In the course of excluding an intracranial lesion in patients who presented with headache and ophthalmic signs, radiological examination revealed marked asymmetry of the superior orbital fissures. Other abnormalities were not found and a cause of the eye signs and the headache could not be ascertained. A search of the literature failed to reveal reports of similar cases. Radiologic examination of 500 patients without intracranial or intraorbital lesions revealed fissure asymmetry in 30 cases [6%]. The appearances and measurements of thin fissure are presented and examples of marked normal fissure asymmetry are demonstrated