Horner Syndrome and Abducens Nerve Paresis Due to a Paranasal Sinus Squamous Cell Carcinoma Involving Cavernous Sinus

摘要

The association of abducens nerve palsy with post-ganglionic Horner syndrome has exquisite localizing value to the posterior cavernous sinus, where sympathetic nerve fibers join the sixth cranial nerve for a short distance. The authors describe the first reported case of this condition caused by invading squamous cell carcinoma of sphenoid sinus.CASE REPORTA 35-year-old man was referred to us because of his 3-week history of horizontal diplopia and ptosis of right eye of 3 months duration. The ophthalmological examination revealed a 2 mm ptosis in the right eye. His corrected visual acuity was 20/20 in each eye. An aniso-coria of 2 mm was present (right pupil: 2 mm, left pupil: 4 mm), which increased in the dark. The light and near reflexes were normal and there was no relative afferent pupillary defect. Funduscopic examination appeared normal in both eyes.