Per UWorld 18061: “(Choice D) Although patients with signs of elevated intracranial pressure (eg, focal neurologic deficit, coma, papilledema) typically require neuroimaging prior to LP, an open fontanelle (as seen in this patient) acts as a pop-off valve to relieve intracranial pressure, thereby limiting the risk of herniation and generally negating the need to obtain a CT scan of the head prior to LP.” In this question, as the main hypothesis is hydrocephalus, brain imaging would be the best next step, but I would suggest addind “afebrile” in the text to avoid misunderstandings. Besides, the extra info, following the stated above is incorrect.
Per UWorld 4871, brain imaging is the best next step when suspecting hydrocephalus which is the best hypothesis in intracranial hypertension in an afebrile infant
response time rejection