What is a sign of increased intracranial pressure (ICP) in a 10-year-old child?

Choice A rationale Headache is a common and early manifestation of increased intracranial pressure (ICP) in a 10-year-old child because the cranial sutures are fused, preventing skull expansion, and the rise in pressure irritates pain-sensitive structures. The headache is typically worse in the morning or awakens the child from sleep due to accumulation of carbon dioxide during sleep, which causes vasodilation. Choice B rationale A bulging fontanel is a sign of increased ICP seen only in infants whose anterior fontanel is still open, which is usually not the case for a 10-year-old child as the fontanel typically closes between 12 and 18 months of age. Once the fontanels are closed and sutures fused, this sign is no longer a physical possibility or indicator of increased pressure. Choice C rationale Tachypnea, which is an abnormally rapid breathing rate, is not typically a sign of increased ICP; in fact, severe, life-threatening ICP can lead to abnormal respiratory patterns such as Cheyne-Stokes breathing or bradypnea due to pressure on the brainstem's respiratory centers. Tachypnea is more commonly associated with hypoxia or metabolic acidosis. Choice D rationale An increase in head circumference, or macrocephaly, is primarily seen in infants and young children before the cranial sutures fuse (about 2 years of age) to accommodate the pressure by skull expansion. In a 10-year-old child with fused sutures, the skull cannot expand, making this finding an unreliable or late indicator of acutely increased pressure.