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Year : 2014  |  Volume : 9  |  Issue : 2  |  Page : 129-131

Benign enlargement of sub-arachnoid spaces in infancy

Department of Radiology, Pondicherry Institute of Medical Sciences, Puducherry, India

Correspondence Address:
Linu Cherian Kuruvilla
Department of Radiology, Pondicherry Institute of Medical Sciences, Ganapathichettikulam, Kalapet, Puducherry - 605 014
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/1817-1745.139309

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Benign enlargement of sub-arachnoid spaces (BESS) is one of the causes of macrocephaly in infants. It is a self-limiting condition and does not require any active medical or surgical treatment. We report a case of an infant aged 4 months who was referred for magnetic resonance imaging (MRI) of the brain as the head circumference of the infant had increased rapidly from the 50 th percentile in the 3 rd month to more than the 95 th percentile in the 4 th month of age. MRI revealed enlarged anterior sub-arachnoid spaces and mild prominence of all the ventricles. A possibility of BESS was suspected since the child was neurodevelopmentally normal. A follow-up MRI done at the age of 18 months showed a reduction in the size of the sub-arachnoid spaces with normal sized ventricles.


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