Radiologic findings of Corpus callosum impingement syndrome

Aim: The primary goal of our study is to contribute to a better understanding and diagnosis of corpus callosum impingement syndrome in patients with obstructive hydrocephalus who develop and do not develop this condition, by conducting detailed assessments and quantitative analyses of MR examinations before and after shunting. Materials and Methods: The study included 52 patients diagnosed with corpus callosum impingement and a control group of 30 patients with similar histories but without the syndrome, based on a retrospective review of images and medical records archived at the Neuroradiology Division of Radiology Department of Istanbul University Cerrahpaşa-Cerrahpaşa Medicine Faculty. A descriptive study was conducted based on MR examinations of cases with impingement diagnosis, and differences between groups were investigated by comparing 30 patients with pre-shunt MR examinations with the control group in various parameters. Results: Radiological data analyzed according to study groups revealed that pre-treatment bifrontal diameter (BFD) length, Evans index, heights of right and left lateral ventricles, corpus callosum height, and callosal sulcus values were higher in the patient group, while distances of each segment of the corpus callosum to the falx and the average falx distance were lower. Furthermore, statistically significant threshold values were found for pre-treatment bifrontal diameter and Evans index for the purpose of disease estimation. Conclusion: Our study has identified that the probable cause of signal changes in the corpus callosum following long-term hydrocephalus is falx pressure. Additionally, the disease was morphologically classified and detailed to prevent misdiagnoses and unnecessary interventions. Keywords: Corpus callosum impingement syndrome, Hydrocephalus, Magnetic resonance imaging