Background: Endoscopic septostomy is the treatment of choice for monolateral obstruction of the foramen of Monro. Common causes of this condition include: neoplasms, hemorrages, infections, congenital atresia, idiopathic occlusion.
Method: All the steps for performing a safe endoscopic pellucidotomy are presented. A brief discussion about the most common technical variations and their rationale is added.
Conclusion: Endoscopic pellucidotomy is a safe and effective treatment when a thorough understanding of anatomy is achieved.
Keywords: Cerebrospinal fluid; Endoscopic septostomy; Obstruction of foramen of monro; Obstructive hydrocephalus.
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