Foramen of Monro choroid plexus papilloma: An extremely rare location managed by endoscopic resection

Choroid plexus papillomas are rare brain neoplasms, primarily observed in children, and typically manifest with symptoms indicative of heightened intracranial pressure and cerebral irritation. In addition, the tumor's localization varies with the patient's age, and diagnostic and therapeutic approaches predominantly rely on imaging findings and surgical interventions, with histopathological examination being essential for confirmation. This study outlines a unique instance of choroid plexus papilloma in a 30-year-old female, who presented with severe headache and vomiting, subsequently revealing hydrocephalus on Brain CT. Remarkably, the tumor was identified in the Foramen of Monro, an exceedingly rare and unreported location in adults. Notably, the patient underwent successful endoscopic resection without complications, a technique sparsely documented in similar cases. Choroid plexus papilloma, predominantly afflicting children, displays varied tumor locations depending on the patient's age. Our report highlights an exceptional case with an atypical tumor location that was not reported before to our knowledge, and addressed through an innovative endoscopic resection method that was recently used in the management of such cases. This underscores the importance of considering diverse tumor presentations, as it has a favorable prognosis achievable through management, especially with the increasing number of reported cases. Moreover, it advocates for the adoption of emerging endoscopic approaches, which exhibit promising outcomes.