Chronic subdural hematoma (cSDH) is one of the most common neurosurgical entities, especially in the elderly population. Diagnosis is usually established via a head computed tomography, while an increasing number of studies are investigating biomarkers to predict the natural history of cSDH, including progression and recurrence. Surgical evacuation remains the mainstay of treatment in the overwhelming majority of cases. Nevertheless, many controversies are associated with the nuances of surgical treatment. We performed a systematic review of the literature between 2010 and 2022, aiming to identify and address the issues in cSDH surgical management where consensus is lacking. The results show ambiguous data in regard to indication, the timing and type of surgery, the duration of drainage, concomitant membranectomy and the need for embolization of the middle meningeal artery. Other aspects of surgical treatment—such as the use of drainage and its location and number of burr holes—seem to have been adequately clarified: the drainage of hematoma is strongly recommended and the outcome is considered as independent of drainage location or the number of burr holes.

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Introduction: Papillary Glioneuronal Tumor (PGNT) is a grade I tumor based on the new World Health Organization CNS tumor classification. Its special feature concerns its biphasic histologic pattern of both glial and neuronal elements. Because of the rarity of this entity, literature is mostly based on case reports. Research Question: The objective of this paper is to display our experience treating endoscopically a papillary glioneuronal tumor located into the third ventricle in an adult patient and to highlight the main points of the literature. Material & Methods: A 75-year-old patient with known Parkinson disease presented with episodes of loss of consciousness and gait disorders in our institution. Brain MRI demonstrated enlargement of ventricular system due to an obstruction caused by an intraventricular tumor in the third ventricle. Results: Patient underwent an endoscopic subtotal removal of the tumor. Postoperative brain CT scan revealed minor residual of the tumor and patient was discharged 2 days after surgery in good clinical condition. Histopathological analysis of the tumor samples matched the diagnosis of PGNT. Postoperative follow-up in 1 month demonstrated great neurological improvement. Discussion & Conclusion: Literature reports that total surgical resection is the treatment of choice in almost all cases of PGNT giving the most favorable clinical outcome. Only 4 cases of PGNT located in 3rd ventricle have been recorded and data for endoscopic management found only for one of the cases concerning a pediatric patient. Therefore, we report for first time removal of third ventricle papillary glioneuronal tumor in adult patients via the endoscopic technique.

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