Isolated Oculomotor Nerve Palsy: A Unique Presentation of Haemophilus influenzae Type A Meningitis.

In this case report, we describe a unique case of Haemophilus influenzae type A meningitis in a 7-month-old previously healthy girl that presented with an isolated cranial nerve (oculomotor) palsy without other signs and symptoms classically associated with this entity such as fever, meningismus, or a generally ill appearance. Oculomotor nerve abnormalities are rare in pediatrics. Congenital oculomotor palsy is the most common cause followed by trauma, infection, inflammatory conditions, neoplasm, aneurysm or other vascular events, and ophthalmoplegic migraines, respectively. Therefore, had it not been for the unusual magnetic resonance imaging findings identified in this patient prompting an extensive infectious workup with lumbar puncture, the diagnosis and treatment of meningitis may have been delayed further or missed all together. This fact emphasizes the importance of maintaining a broad differential when children present with neurologic abnormalities such as cranial nerve palsies.