Epilepsy research · 2022
Epilepsy with Eyelid myoclonias - A diagnosis concealed in other genetic generalized epilepsies with photoparoxysmal response.
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Zawar Ifrah, Toribio Martha Guadalupe Garcia, Xu Xiaowei, Alnakhli Rawyah Saleh, Benech Daniela, Valappil Ahsan Moosa Naduvil, Wyllie Elaine, Burgess Richard, Kotagal Prakash, Lachhwani Deepak, Gupta Ajay, Knight Elia Pestana
Аннотация
OBJECTIVE: Epilepsy with eyelid myoclonias(EMA) is a genetic generalized epilepsy (GGE) characterized by eyelid myoclonia, eye-closure sensitivity and photosensitivity. Data on EMA patients who specifically present with photoparoxysmal response on EEG is lacking. EMA is an under-recognized syndrome which is frequently misclassified as another GGE. The main objective of our research is to describe the occurrence of EMA versus other GGEs among patients with photoparoxysmal response and evaluate their distinguishing features.
METHODS: We retrospectively identified all patients who had photoparoxysmal response on EEGs performed at Cleveland clinic between 01/01/2012 and 12/31/2019. Initial epilepsy diagnosis and clinical data were collected. EEGs were reviewed for eyelid myoclonia and eye-closure-sensitivity which were used as main diagnostic clues for EMA. If clinical criteria was met, diagnosis was revised as EMA.
RESULTS: Of 249 patients with photoparoxysmal response, 70(28.1%) met EMA criteria. Sixty-two (88.6%) were females. Mean age of onset of epilepsy was 7 years (+7.9) and 120(48.2%) had other GGEs. Fifty-four (77.1%) patients with EMA were initially classified as another epilepsy. Initial diagnosis included CAE or JME in 40(57.1%) patients with EMA so we compared EMA with these syndromes. Female preponderance, drug refractoriness, older age of onset and generalized myoclonia were more common in EMA than CAE. Earlier age of onset, absence seizures, and lack of generalized myoclonic jerks were more common EMA than JME.
SIGNIFICANCE: Our study demonstrates that EMA is under-recognized among GGE patients with photoparoxysmal response. It highlights distinguishing clinical and electrographic features which separate EMA from other GGEs. It emphasizes the diverse treatments utilized and the need for therapeutic options for patients with refractory EMA.
METHODS: We retrospectively identified all patients who had photoparoxysmal response on EEGs performed at Cleveland clinic between 01/01/2012 and 12/31/2019. Initial epilepsy diagnosis and clinical data were collected. EEGs were reviewed for eyelid myoclonia and eye-closure-sensitivity which were used as main diagnostic clues for EMA. If clinical criteria was met, diagnosis was revised as EMA.
RESULTS: Of 249 patients with photoparoxysmal response, 70(28.1%) met EMA criteria. Sixty-two (88.6%) were females. Mean age of onset of epilepsy was 7 years (+7.9) and 120(48.2%) had other GGEs. Fifty-four (77.1%) patients with EMA were initially classified as another epilepsy. Initial diagnosis included CAE or JME in 40(57.1%) patients with EMA so we compared EMA with these syndromes. Female preponderance, drug refractoriness, older age of onset and generalized myoclonia were more common in EMA than CAE. Earlier age of onset, absence seizures, and lack of generalized myoclonic jerks were more common EMA than JME.
SIGNIFICANCE: Our study demonstrates that EMA is under-recognized among GGE patients with photoparoxysmal response. It highlights distinguishing clinical and electrographic features which separate EMA from other GGEs. It emphasizes the diverse treatments utilized and the need for therapeutic options for patients with refractory EMA.