Intraventricular Bone Dust Migration after Endoscopic Third Ventriculostomy: Illustrative Report of 2 Cases.

Introduction: Autologous bone dust replacement is a commonly used technique to seal a defect created from a burr hole. However, postoperative migration of these bone fragments may occur as an uncommon complication of endoscopic third ventriculostomy (ETV).

Case Presentation: We report 2 cases of intraventricular bone dust migration resulting in acute hydrocephalus from physical obstruction of the stoma and infection.

Surgery for orbital metastasis from breast carcinoma initially presenting with progressive proptosis.

We present a 45-year-old woman with metastatic breast disease who initially presented with progressive proptosis of her right eye causing limited motility, diplopia and eye pain. MRI done showed an avidly enhancing right sphenoorbital mass causing displacement in the lateral and superior recti muscles with lysis and infiltration of the greater sphenoid wing and lateral orbital wall. The patient underwent surgery resulting in immediate relief of proptosis and resolution of symptoms.

AVM Compartments: Do they modulate trasnidal pressures? An electrical network analysis.

Background: Arteriovenous malformation (AVM) compartments are thought as independently fed, hemodynamically independent components of the AVM nidus. Its possible role in modulating transnidal pressures have not been investigated to our knowledge.

Objective: To investigate if AVM compartments play a role in modulating transnidal pressures by using electrical models as a method of investigation.