• Roberto Peláez-Cruz, Alba Díaz-Baamonde, Maria J Téllez, Javier Urriza, Saadi Ghatan, and Sedat Ulkatan.
• Department of Intraoperative Neurophysiology, Mount Sinai West Hospital, 1000, 10th Avenue, Suite 2B30, New York, NY, 10019, USA. aroberpc@gmail.com.
• J Clin Monit Comput. 2023 Feb 1; 37 (1): 374337-43.

AbstractMedian nerve somatosensory evoked potentials (SEPs) may present changes during cavernous malformation (CM) resection unrelated to new post-operative sensory deficits. We performed intraoperative neurophysiological monitoring of median SEPs (m-SEPs) in three patients who underwent CM resection (surgery) near the sensory-motor cortex. The only preoperative clinical manifestations in all patients were seizures. All patients presented m-SEPs alterations on the side of the lesion during the procedure. Two patients presented permanent changes in the cortical potentials. In the third patient, the cortical and subcortical components suffered temporal fluctuations to return to baselines at the end of the surgery. None of these patients developed new post-operative clinical deficits. During brain cavernous malformation resection, significant fluctuations in the amplitude of different components of m-SEPs may occur. These changes may be due to excitability variations on m-SEP generators and do not translate into new post-operative neurological deficits.© 2022. The Author(s), under exclusive licence to Springer Nature B.V.

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