Aim: To present a case of acquired Brown’s syndrome, subsequently found to be caused by the presence of a left fronto-ethmoidal mucocoele.
Method: The clinical details of a woman aged 56 years with sudden-onset diplopia are documented from initial presentation to final results.
Results: An apparent acquired Brown’s syndrome was found to be due to a mucocoele in the left fronto-ethmoidal sinus. Surgery to remove the mucocoele was undertaken. A small prism was incorporated into reading glasses for use in the evenings when required.
Conclusion: Binocular single vision was restored following excision of the mucocoele.