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A patient with neurofibromatosis type I and breast carcinoma developed a bilateral but asymmetric blepharospasm and paresis of the left abducens muscle over a 2-week course. MRI disclosed a small lesion in the left dorsomedial lower pontine region. Electrodiagnostic investigations revealed bilateral R1 responses after stimulation of the left supraorbital nerve and enhancement of R1 and R2 recovery curves. We concluded that lesions in the lower pontine tegmentum may cause blepharospasm.
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Aramideh et al. (1996) studied this question.
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