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Citation:
Veiga M, Tail sign. Reference article, Radiopaedia.org (Accessed on 01 May 2024) https://doi.org/10.53347/rID-75041
The tail sign has been described as being specific to Dandy-Walker malformation in fetal MRI.1
It is described as a linear T2 hypointensity in the inferior part of the vermis. Histologically, it corresponds to a thickness of the fourth ventricle roof that appears raised and dysplastic.1
The specificity and clinical utility of this sign have been disputed and considered misleading.2
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1. Silvia Bernardo, Valeria Vinci, Matteo Saldari, Francesca Servadei, Evelina Silvestri, Antonella Giancotti, Camilla Aliberti, Maria Grazia Porpora, Fabio Triulzi, Giuseppe Rizzo, Carlo Catalano, Lucia Manganaro. Dandy–Walker Malformation: is the ‘tail sign’ the key sign?. (2015) Prenatal Diagnosis. 35 (13): 1358. https://doi.org/10.1002/pd.4705
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2. Thomas Kau, Robert Marterer, Raimund Kottke, Robert Birnbacher, Janos Gellen, Eszter Nagy, Eugen Boltshauser. Blakeʼs Pouch Cysts and Differential Diagnoses in Prenatal and Postnatal MRI. (2020) Clinical Neuroradiology. https://doi.org/10.1007/s00062-019-00871-4
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