PT  - JOURNAL ARTICLE
AU  - Jan, Mohammed M.
TI  - An unusual case of isolated trochlear nerve palsy
DP  - 2007 Apr 01
TA  - Neurosciences Journal
PG  - 149--151
VI  - 12
IP  - 2
4099  - http://nsj.org.sa/content/12/2/149.short
4100  - http://nsj.org.sa/content/12/2/149.full
SO  - Neurosciences (Riyadh)2007 Apr 01; 12
AB  - Trochlear nerve palsy is rarely encountered in children and only 5% are truly isolated. Multiple sclerosis (MS) is also extremely uncommon in children. This report describes an otherwise healthy 10-year-old boy who presented with a 5-day history of vertical diplopia with associated dizziness, decreased appetite, and unsteadiness. He had no recent history of infection and no previous history of neurological symptoms. Ophthalmologic assessment revealed full ocular ductions and right hyperdeviation in primary gaze during alternate cover test. This hyperdeviation increased during left gaze, and right head tilt consistent with paresis of the right oblique muscle. Brain MRI revealed multiple well-defined hyperintense T2 lesions in the periventricular and subcortical white matter, and brainstem, suggestive of MS. His symptoms resolved after 2 weeks with no treatment. To conclude, isolated trochlear nerve palsy can be the initial clinical manifestation of childhood MS. Long term follow up is needed to confirm the diagnosis of MS.