banana sign

banana sign

the abnormal curvature of the cerebellum noted on ultrasound imaging in a fetus with Arnold-Chiari malformation.
Farlex Partner Medical Dictionary © Farlex 2012
An ultrasonographic finding seen when a major neural tube defect accompanies Arnold-Chiari malformation, spina bifida and other neural tube defects
Appearance Cerebellar tonsils and midbrain structures herniate into the foramen magnum, causing ventriculomegaly 2º to compression of the outflow from the 3rd and 4th ventricles; the ‘banana’ corresponds to the compressed cerebral hemisphere
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.

banana sign

Imaging An ultrasonographic finding seen when a major neural tube defect accompanies Arnold-Chiari malformation Appearance Cerebellar tonsils and midbrain structures herniate into the foramen magnum, causing ventriculomegaly 2º to compression of the outflow from the 3rd and 4th ventricles; the 'banana' corresponds to the compressed cerebral hemisphere.
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.

ba·na·na sign

(bă-nan'ă sīn)
The abnormal curvature of the cerebellum noted on ultrasound imaging in a fetus with Arnold-Chiari malformation
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
Mentioned in ?
References in periodicals archive ?
[8] Cerebellar abnormalities are present in 95% of fetuses with open spina bifida scanned before 24 weeks (either the banana sign, where the cerebellum is curved and elongated not the usual rounded dumb-bell appearance- or absence of the cerebellum).
A business has snapped up a banana signed and half-eaten by GMTV presenter Kate Garraway for pounds 1,650 from an auction website.
The offer followed a story last week when a banana signed and bitten into by Kate was sold on the internet for pounds 1600.