“…Metastatic seeding of an intramedullary astrocytoma in children has been reported on a few occasions [2,12,13]. The efficacy of neuroendoscopy in cases of obstructive hydrocephalus is widely recognized and its applications include also performing biopsies in tumoral [17][18][19] and non-tumoral lesions [20,21], in the supratentorial [17,22] and infratentorial [20,21,23] compartment. However, the role of endoscopic procedures in cases of communicating hydrocephalus is controversial [17,19,22].…”