Abstract
Delayed subaponeurotic fluid collection (DSFC) is a rare cause of scalp swelling that typically presents in healthy-term babies during the second month of life. It is a benign, self-limited condition that requires only conservative management. We present a case of DSFC in a male infant who was brought to our emergency department by his parents at the age of 52 days because of concerns about a newly noticed fluctuating scalp mass. The baby was managed conservatively, and the DSFC completely resolved after three weeks. We describe and discuss the diagnostic workup conducted and the management plan implemented in line with the scientific literature and similar cases previously reported. Given its benign but rare nature, pediatricians and neurosurgeons should be more aware of DSFC as a potential entity in the differential diagnosis of fluctuant scalp swellings. Early recognition can prevent unnecessary investigations or interventions and provide reassurance to parents regarding the condition's benign course. To the best of our knowledge, this is the first reported case in Saudi Arabia, the second reported case from the Middle East, and the second from Asia.