Benign enlargement of subarachnoid spaces
9 months old boy with increased head circumference
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- widening of the bi-frontal and anterior inter-hemispheric CSF spaces
- no flattening of adjacent gyri.
- normal sulci posteriorly.
- nearly normal ventricular size with no pressure effects on the surrounding brain tissue
Benign enlargement of the subarachnoid spaces in infancy (BESS) also known as benign external hydrocephalus (BEH), a benign enlargement of subarachnoid spaces seen in infancy. It is characterized clinically by macrocephaly or frontal bossing.
It usually occurs in males than females. It has familial predilection. The condition resolves spontaneously by the age of 2 years.