“ Think of this if you see a suprasellar mass in a child—it is the most likely diagnosis. There is a bimodal incidence peak (from ages 5-1...
“
Think of this if you see a suprasellar mass in a child—it is the most likely diagnosis. There is a bimodal incidence peak (from ages 5-10 years and 50-60 years). It is more common in males. Clinical presentation is with visual field defects and/or diabetes insipidus. The tumour contains calcium, keratin and epithelium due to its origin from squamous epithelial rest metaplasia.
CT
• Irregular outline, up to 90% in the suprasellar cistern
• Appearance ranges from solid to cystic, or a mix of the two
• Commonly calcified (90%—especially in children)
• Associated with bone destruction in up to 75%
MRI
• Typically high signal on both T1 (due to proteinaceous debris) and T2 with contrast enhancement of the solid component
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