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Letter
Ethmoidal sinus mucocele: an unusual cause of acquired Brown syndrome
  1. R Bhola,
  2. A L Rosenbaum
  1. Jules Stein Eye Institute, University of California Los Angeles, CA, USA
  1. Correspondence to: Arthur L Rosenbaum MD, Jules Stein Eye Institute, 100 Stein Plaza, David Geffen School of Medicine at UCLA, Los Angeles, CA 90095-7002, USA; rosenbaumjsei.ucla.edu

https://doi.org/10.1136/bjo.2004.062349

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    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.

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