Delayed Subaponeurotic Fluid Collections of Infancy

A 2-month-old male infant was referred for evaluation of a fluctuant scalp mass. He was born at term to a nulliparous mother following a difficult labor. After failing vacuum-assisted delivery, he was delivered via cesarean delivery. His parents first noted scalp swelling at approximately 5 weeks of age, which increased and then stabilized in the weeks prior to his referral. The fluid collection was noted to be fluctuant, free-flowing across suture lines, and without discoloration or bruising (Figure 1).

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