Which of the following is the most concerning sign of increased intracranial pressure in an infant?

Choice A rationale A high-pitched cry in an infant can be indicative of increased intracranial pressure (ICP) due to stretching of the meninges or irritation of the central nervous system. However, it is a non-specific sign that may also relate to pain or general distress. Normal infant crying is variable, but this specific quality suggests a potentially serious neurological issue. Choice B rationale Poor feeding is a non-specific sign of general illness in an infant, reflecting overall malaise or potentially a depressed level of consciousness secondary to increased ICP. Reduced appetite or difficulty sucking/swallowing suggests decreased neurological function or systemic distress but is often less immediately concerning than vital sign changes. Choice C rationale Separated cranial sutures (diastasis) and a bulging fontanelle are classic, late-stage physical findings in infants with chronic or acutely escalating ICP. The unfused sutures provide a compensatory mechanism for the expanding volume, but once separated, it signifies a substantial, long-standing pressure increase. Choice D rationale Bradycardia (abnormally slow heart rate) is the most concerning part of the Cushing's Triad (hypertension, bradycardia, and irregular respirations), which is a late and critical physiological response to dangerously elevated ICP. The reduced heart rate is a reflex response mediated by the brainstem to maintain cerebral perfusion pressure (CPP).