Presentation
Macrocephaly.
Patient Data
Age: 2 months
Gender: Female
From the case:
Benign enlargement of the subarachnoid space in infancy
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Widening of the bifrontal and anterior interhemispheric CSF spaces.
Normal ventricular size, no pressure effects on the surrounding brain tissue, no cerebral atrophy
Case Discussion
Benign enlargement of the subarachnoid spaces in infancy (BESS or BESSI) also known as benign external hydrocephalus (BEH) is, as per the name, a benign enlargement of the subarachnoid spaces in infants. It usually involves the frontal lobe subarachnoid spaces, and it is characterized clinically by macrocephaly or frontal bossing. It's the most common cause of macrocephaly.