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Andrew B. Foy, Kathleen J. Sawin, Tia Derflinger, Amy K. Heffelfinger, Jennifer I. Koop, Susan S. Cohen, and Eileen C. Sherburne

OBJECTIVE

Fetal surgery for myelomeningocele has become an established treatment that offers less risk of requiring a ventricular shunt and improved functional outcomes for patients. An increasing body of literature has suggested that social determinants of health have a profound influence on health outcomes. The authors sought to determine the socioeconomic and racial and ethnic backgrounds of patients who were treated with fetal surgery versus those who underwent postnatal repair.

METHODS

Demographic data, the method of myelomeningocele repair, insurance status, and zip code data for patients entered into the National Spina Bifida Patient Registry (NSBPR) from Children’s Wisconsin were collected. The zip code was used to determine the Distressed Communities Index (DCI) score, a composite socioeconomic ranking with scores ranging from 0 (no distress) to 100 (severe distress). The zip code was also used to determine the median household income for each patient based on the US Census Bureau 2013–2017 American Community Survey 5-year estimates.

RESULTS

A total of 205 patients were identified with zip code and insurance data. There were 23 patients in the fetal surgery group and 182 patients in the postnatal surgery group. All patients were born between 2000 and 2019. Patients in the fetal surgery group were more likely to have commercial insurance (100% vs 52.2%, p < 0.001). Fetal surgery patients were also more likely to be non-Hispanic White (95.7% vs 68.7%, p = 0.058), just missing the level of statistical significance. Patients who underwent fetal surgery tended to reside in zip codes with a higher median household income (mean $66,507 vs $59,133, p = 0.122) and less-distressed communities (mean DCI score 31.3 vs 38.5, p = 0.289); however, these differences did not reach statistical significance.

CONCLUSIONS

Patients treated with fetal surgery were more likely to have commercial insurance and have a non-Hispanic White racial and ethnic background. The preliminary data suggest that socioeconomic and racial and ethnic disparities may exist regarding access to fetal surgery, and investigation of a larger population of spina bifida patients is warranted.

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Jessica S. Lin, Sean M. Lew, Charles J. Marcuccilli, Wade M. Mueller, Anne E. Matthews, Jennifer I. Koop, and Mary L. Zupanc

Object

The object of this study was to evaluate surgical outcome in a select group of patients with medically refractory epilepsy who had undergone corpus callosotomy combined with bilateral subdural electroencephalography (EEG) electrode placement as the initial step in multistage epilepsy surgery.

Methods

A retrospective chart review of 18 children (ages 3.5–18 years) with medically refractory symptomatic generalized or localization-related epilepsy was undertaken. A corpus callosotomy with subdural bihemispheric EEG electrode placement was performed as the initial step in multistage epilepsy surgery. All of the patients had tonic and atonic seizures; 6 patients also experienced complex partial seizures. All of the patients had frequent generalized epileptiform discharges as well as multifocal independent epileptiform discharges on surface EEG monitoring. Most of the patients (94%) had either normal (44%) MR imaging studies of the brain or bihemispheric abnormalities (50%). One patient had a suspected unilateral lesion (prominent sylvian fissure).

Results

Of the 18 patients who underwent corpus callosotomy and placement of subdural strips and grids, 12 progressed to further resection based on localizing data obtained during invasive EEG monitoring. The mean patient age was 10.9 years. The duration of invasive monitoring ranged from 3 to 14 days, and the follow-up ranged from 6 to 70 months (mean 35 months). Six (50%) of the 12 patients who had undergone resection had an excellent outcome (Engel Class I or II). There were no permanent neurological deficits or deaths.

Conclusions

The addition of invasive monitoring for patients undergoing corpus callosotomy for medically refractory epilepsy may lead to the localization of surgically amenable seizure foci, targeted resections, and improved seizure outcomes in a select group of patients typically believed to be candidates for palliative surgery alone.