Introduction: This study evaluated whether comorbidities such as genetic conditions, other congenital anomalies, infection, and other exposures impact the mortality rate and/or neurologic outcomes of patients with congenital ventriculomegaly. Methods: This was a retrospective cohort study that assessed the mortality rate and developmental delay of 91 patients diagnosed with congenital ventriculomegaly followed at Cincinnati Children’s Hospital Medical Center between Jan 1, 2010-Dec 31, 2020. Results: Of the 91 patients included in the study, 20 (22.0%) had a genetic diagnosis. The mortality rate was higher for patients with a genetic diagnosis compared to those without a genetic diagnosis (p=0.022), as was the rate of developmental delay (p=0.026). The presence of comorbidities (confirmed genetic condition, confirmed maternal exposures or infections, and/or additional anomalies) were not associated with an increased risk of mortality nor developmental delay. Conclusions: Patients diagnosed with congenital ventriculomegaly and a genetic condition have a significantly higher risk of early mortality and developmental delay compared to those without a genetic diagnosis. Therefore, diagnostic genetic testing should be considered after identification of congenital ventriculomegaly to facilitate counseling about prognosis and care management.
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