Question

Which type of primary brain tumor usually arises in the walls of the fourth ventricle in children and in the lateral ventricles in adults

Answer 1

Primitive neuroectodermal tumor (PNET)

Step-by-step explanation:

They usually occur in early childhood but may become symptomatic in adult life. In children, they commonly occur in or near a spinal fluid sac known as the fourth ventricle and are called medulloblastomas.