Tilted telephone receiver sign
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The tilted telephone receiver sign (TTRS) has been described as a specific imaging feature of PHACES syndrome in fetal MRI 1
On the coronal plane, the TTRS sign is described as:
upward displaced unilateral hypoplastic cerebellar hemisphere;
asymmetric dilated 4th ventricle connected to as ipsilateral retrocerebellar cyst
elongated oblique connection between the hemispheres formed upwardly rotated and deviated vermis merging with the contralateral cerebellar peduncle
It shouldn't be confused with the telephone receiver deformity which is a characteristic bowing of the shaft of the long bones, usually the humeri or femora, seen in thanatophoric dysplasia.
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