0 J-shaped sella

A J-shaped sella is a variant configuration of the sella turcica, where the tuberculum sellae is flattened, thus forming the straight edge of the "J". The dorsum sellae remains rounded and forms the loop of the "J"

Differential diagnosis for a J-shaped sella includes: 
mucopolysaccharidoses : e.g. Hurler syndrome 
optic chiasm glioma
hydrocephalus : mild
normal variant (~5% of children)

"Mnemonic : MOHAN"

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