Internal ophthalmoplegia and cranial neuropathy without external ophthalmoplegia. A report of 2 cases.

Two patients presented with an acute syndrome of internal ophthalmoplegia in the absence of external ophthalmoplegia, bilateral involvement of other cranial nerves, and minimal evidence of peripheral neuropathy. Cerebrospinal fluid protein was slightly raised, and moderate slowing of nerve conduction velocity was observed peripherally. It is suggested that these cases may represent a variant of acute post-infectious polyneuritis.