Abstract
To determine whether callosal angle (CA) measurement, a diagnostic and prognostic tool used for normal-pressure hydrocephalus in adults, is a reliable radiological parameter for evaluating endoscopic third ventriculostomy (ETV) outcomes in pediatric patients. Forty-seven pediatric patients with hydrocephalus who underwent successful ETV in our clinic between 2011 and 2015 were included in this study. Preoperative and postoperative three-month CA, lateral ventricle frontal horn (LVFH) width, Evans' index (EI), and frontal-occipital horn ratio (FOR) parameters were recorded, with changes analyzed using a paired-samples t-test. There were 29 male and 18 female patients included within the cohort. For mean preoperative values, LVFH width was 58.8 ± 14.9 mm, EI was 0.43 ± 0.09, FOR was 0.51 ± 0.74, and CA was 78.5° ± 36.4°. Separately, for mean postoperative values, LVFH width was 54 ± 14.2 mm, EI was 0.39 ± 0.09, FOR was 0.47 ± 0.07, and CA was 104.5° ± 32.6°. The CA was increased and the LVFH width, EI, and FOR were decreased in all patients within three months after surgery. The postoperative three-month change in CA was higher than those observed in the other parameters. Changes in CA after successful ETV were dramatically higher than those in the other ventricular parameters. For this reason, we suggest CA be used as a radiological criterion during early radiological follow-up of patients after ETV.
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