Delayed Subaponeurotic Fluid Collection of Infancy

Delayed subaponeurotic fluid collection (DSFC) is a rare but benign lesion in infants that typically presents as an acquired mobile mass on the scalp at 1-3 months and resolves in 2-4 months. The cause of this fluid collection has been determined to be cerebrospinal fluid but the mechanism is unknown. Infants with this acquired mass should be evaluated for trauma (accidental and non-accidental) as well as bleeding disorders, but most cases will be benign and resolve with conservative management.