One of the important sign of intracranial pressure increases as tumor grows and its pressure on surrounding tissue and spinal cord canal has obviously attracted the attention.
Nelson Texbook of Pediatrics; 19th Edition
Patricia A, McKinney. “Central Nervous System Tumours in Children” 2005; 60 – 68
Kevin L.Stevenson. Pediatric brain tumours. J. Neuroscience 2004; 10-20