Strabismus resulting from an anomalous extraocular muscle in Gorlin syndrome.

Strabismus associated with anomalous extraocular muscles is rare. We present a case of strabismus caused by an anomalous orbital structure that was histopathologically consistent with an accessory extraocular muscle rather than a fibrous band, in a patient with Gorlin syndrome (nevoid basal cell carcinoma syndrome), an autosomal dominant multisystem disorder related to a mutation in the patched tumor suppressor gene (PTCH). Histopathology of an anomalous orbital structure consistent with extraocular muscle has not been previously reported.