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Published on: January 17, 2018
Absent enhancement interface sign: a novel radiologic indicator of intrasellar arachnoid cysts
Adriana Melo1,2, Leticia Almeida3, Monica Gadelha4,3
1Instituto de Medicina Nuclear e Endocrinologia, Campor dos Goytacazes, RJ, Brazil. drimmelo@gmail.com.
Purpose:
Intrasellar arachnoid cysts are extremely rare, and their differentiation from other cystic lesions can be challenging because of their similar imaging characteristics.
Methods:
This study aimed to describe the imaging characteristics observed in five patients and correlate them with developmental and growth mechanisms.
Results:
These cysts are characterized by the lack of contrast enhancement in their walls and posterior displacement of the pituitary gland. As a result, no enhancing tissue is present at the anterior portion of the sella where it interfaces with the sphenoid sinus.
Conclusion:
We believe that this sign will lead to more accurate diagnosis and improve surgical planning.
