A nurse is performing a physical assessment on a 3-month-old…

A nurse is perfоrming а physicаl аssessment оn a 3-mоnth-old infant. The nurse palpates the anterior fontanel while the baby is calm and upright. The fontanel feels firm, tense, and bulges above the level of the surrounding skull even when the infant is not crying. What is the most appropriate initial interpretation of this finding?