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Histopathological changes of fibrosis in human extra-ocular muscle caused by botulinum toxin A
Ji Li1, Alexandra Allende2, Frank Martin3
1Concord General Repatriation Hospital, Sydney.
Abstract:
We report the histopathological findings in 3 patients where injections of botulinum toxin were used prior to strabismus surgery. In all cases we found evidence of permanent extraocular muscle atrophy and fibrosis.

