Delayed trochlear nerve palsy in a case of zoster oticus.

A 57-year-old man with herpes zoster oticus developed a delayed fourth nerve palsy followed by transient intermittent sixth nerve weakness. Trochlear nerve lesions occur rarely with zoster, particularly in the absence of zoster ophthalmicus. A knowledge of the wide range of motor manifestations and the chronicity of meningitis with zoster will afford earlier diagnosis without resort to arteriography.