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  • Title: Transcallosal Suprachoroidal Approach for a Small Third Ventricular Colloid Cyst.
    Author: S Rai HI, Mishra S, Sahu R, Katiyar V.
    Journal: Neurol India; 2022; 70(2):515-519. PubMed ID: 35532612.
    Abstract:
    BACKGROUND AND INTRODUCTION: The interhemispheric transcallosal approach provides an elegant pathway to access the lesions of the third ventricle. However, every step of this approach is fraught with hazards which must be negotiated delicately. A comprehensive knowledge of surgical anatomy coupled with technical skill is necessary for optimum surgical results. OBJECTIVE: This video aims to address the surgical nuances of the suprachoroidal transcallosal approach while accessing the lesions around the foramen of Monro in the anterior and middle part of the third ventricle. SURGICAL TECHNIQUE: A 16-year-old boy presented with worsening headaches with episodes of speech arrest and blank stare for 6 years, which had become more frequent over the past 4-5 months. Radiology showed a subcentimeteric colloid cyst at the foramen of monro. A transcallosal corridor was used to reach the foramen of monro, and the suprachoroidal access was adopted to uncover the colloid cyst and excise it completely preserving the deep veins. RESULTS: The patient had uneventful recovery and radiology showed complete excision of the cyst. CONCLUSION: Transcallosal approach, being minimally invasive, exploits the natural extra-axial corridor (interhemispheric) obviating the need for a cortical incision. The suprachoroidal approach mitigates the risks of thalamostriate vein injury, basal ganglia stroke, and hemiparesis.
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