TY - JOUR T1 - Ethmoidal sinus mucocele: an unusual cause of acquired Brown syndrome JF - British Journal of Ophthalmology JO - Br J Ophthalmol SP - 1069 LP - 1069 DO - 10.1136/bjo.2004.062349 VL - 89 IS - 8 AU - R Bhola AU - A L Rosenbaum Y1 - 2005/08/01 UR - http://bjo.bmj.com/content/89/8/1069.1.abstract N2 - Brown syndrome was first characterised in 1950 by Harold Whaley Brown as a restrictive limitation to elevation in adduction.1 On the basis of surgical findings Brown implicated a shortened superior oblique (SO) tendon sheath as the cause of this syndrome. Most subsequent reports have alternatively proposed an abnormality in the trochlear-SO tendon complex as the cause of restriction to elevation in adduction. Although various causes of acquired Brown syndrome have been described, its association with ethmoidal mucocele is very rare. A 38 year old man noted sudden onset of binocular vertical diplopia … ER -