Two cases of late-onset myasthenia gravis with features simulating trochlear nerve palsy.

Accession number;00A0298718
Title;Two cases of late-onset myasthenia gravis with features simulating trochlear nerve palsy.
Author; NONAKA FUMITAKA (Okayama Univ., Sch. of Med.) KONO REIKA (Okayama Univ., Sch. of Med.) OTSUKI HIROSHI (Okayama Univ., Sch. of Med.)
Journal Title;Japanese Journal of Clinical Ophthalmology
Journal Code:Z0515B
ISSN:0370-5579
VOL.54;NO.2;PAGE.255-259(2000)
Figure&Table&Reference;FIG.6, REF.18
Pub. Country;Japan
Language;Japanese
Abstract;We diagnosed two females, aged 40 and 77 years, as unilateral trochlear palsy following through clinical examinations including prism cover test in 9 directions, quantitation of rotation using a red glass and tangent screen of Harms, and three-step test of Parks. Surgery to one of the vertical rectus muscles induced orthotropia and disappearance of diplopia. Lid ptosis and vertical deviation recurred later in both cases. Further systemic examinations including tensilon test led to the diagnosis of late-onset myasthenia gravis. These cases illustrate that myasthenia gravis may be an underlying cause of apparent palsy involving a single or multiple extraocular muscles. (author abst.)