The Hidden Cavernous Mystery Behind a Headache: A Case Report of Tolosa-Hunt Syndrome.

Tolosa-Hunt syndrome (THS) is a rare, non-specific inflammatory disorder that typically manifests as painful ophthalmoplegia, associated with systemic symptoms such as gastrointestinal distress, and restricted eye movements. This case report describes a patient with acute neurological symptoms, including right-sided headache, eye pain, and oculomotor, trochlear, and abducens nerve palsy. A 45-year-old female patient presented with a complaint of acute right-sided headache and eye pain. The patient exhibited significant oculomotor, trochlear, and abducens nerve palsies. All other physical and neurological examinations, as well as routine investigations, were normal. A brain MRI revealed noncaseating granulomatous inflammation consistent with the diagnosis of THS, which was responsible for the painful ophthalmoplegia. The patient was treated with glucocorticoid therapy, which resulted in a drastic improvement of symptoms, including the resolution of the headache, eye pain, and nerve palsy. THS is a rare diagnosis, often requiring exclusion of other potential causes of ophthalmoplegia. This case highlights the importance of considering THS in the differential diagnosis of patients presenting with acute cranial nerve palsies and unexplained headache, especially when imaging reveals granulomatous inflammation. Prompt treatment with glucocorticoids can lead to significant symptom resolution. THS, though uncommon, should be considered in the differential diagnosis of patients with acute, unexplained ophthalmoplegia and headache. Early diagnosis and initiation of glucocorticoid therapy can significantly improve patient outcomes.