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Presentation type	E-poster
Title	A curious case of recurrent transient diplopia

Purpose	Not many diseases are known to cause recurrent episodes of cranial nerve palsy. We discuss such an uncommon case involving multiple ocular cranial nerves over a period of two years.
Methods	A 37-year-old man presented with 4 episodes of diplopia caused by different ocular cranial nerve palsies: left trochlear nerve (April 2021), right trochlear nerve (May 2022), left abducens nerve (October 2022), inferior branch of the right oculomotor nerve (March 2023).
Results	Work-up including full blood analysis, lumbar puncture, single nerve fiber EMG, MRI brain, CT thorax and PET scan did not reveal any underlying etiology. All episodes resolved spontaneously. A trial with oral steroids did not result in improvement during the last two episodes.
Conclusion	Literature research showed a very similar case, in which the MRI scan showed changes in the cavernous sinus only after almost 30 years. Despite not fulfilling all criteria, Tolosa-Hunt syndrome should be considered in case of recurrent cranial nerve palsies. Another differential diagnosis to be considered in our case is the exclusionary diagnosis of idiopathic recurrent polyneuritis cranialis.
Conflict of interest	No

Authors 1

Last name	VERMEULEN
Initials	L
Department	Dept. of Ophthalmology, Antwerp University Hospital
City	Edegem, Belgium

Authors 2

Last name	De Keizer
Initials	RJW
Department	Dept. of Ophthalmology, Antwerp University Hospital + Leiden University Medical Center
City	Edegem, Belgium + Leiden, The Netherlands

Authors 3

Last name	Kerstens
Initials	J
Department	Dept. of Neurology, Antwerp University Hospital
City	Edegem, Belgium

Authors 4

Last name	Van Lint
Initials	M
Department	Dept. of Ophthalmology, Antwerp University Hospital
City	Edegem, Belgium