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17 Cards in this Set

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ANENCEPHALY
Most common fetal intracranial anomaly. The base of the brain and face are the only things present in the head; the craniaum is absent.
ARNOLD-CHIARI MALFORMATION (TYPE II)
Low position of the cerebellum in the upper cervical spinal canal due to cord tethering. Associated with “Lemon” skull shape, banana-shaped cerebellum, and hydrocephalus.
BANANA SIGN
Change in the shape of the cerebellum
(it becomes curved) that occurs in the presence of spina bifida.
CISTERNA MAGNA
Fluid-filled space at the back of the head that lies between the cerebellum and the skull
CYCLOPS
A single eye is present. Associated with holoprosencepaly.
CYSTIC HYGROMA
Large fluid-containing sac filled with lymph, usually located in the region of the neck. May be part of a generalized fatal condition—lymphangiectasia—or a benign focal process. Associated with Turner’s and Down syndrome
DANDY-WALKER SYNDROME
Brain anomaly with a dilated fourth ventricle and possible secondary dilatation of the rest of the ventricles of the brain. A small cerebellum is the cardinal feature.
ENCEPHALOCELE
HERNIATION OF THE COVERINGS OF THE BRAIN THROUGH DEFECT IN THE SKULL. BRAIN TISSUE IS CONTAINED W/IN THE HERNIATION, ALTHOUGH USUALLY MOST OF THE CONTENTS OF THE SAC ARE FLUID.
EXENCEPHALY
VARIANT OF ANENCEPHALY IN WHICH SOME CORTICAL BRAIN REMAINS
HOLOPROSENCEPHALY
Intracranial anomaly. A Horseshoe-shaped ventricle replaces the 2 lateral ventricles. Usually fatal or causes severe mental retardation. Associated w/ Trisomy 13 and facial defects such as cleft lip and palate, hypotelorism in extreme cases, cyclopia and probscis
HYDRANENCEPHALY
Absence of the cortical brain. Portions of the mdbrain and brainstem are present. Not compatible with life.
HYDROCEPHALUS
Marked enlargement of the cerebral ventricles. Implies entricular obstruction. A better term is Ventriculomegaly or nonspecific ventricular enlargement.
INIENCEPHALY
Defect consisting of an Encephalocele that involves the posterior aspects of the skull and the cervical vertebrae; some vertebrae may be missing.
LEMON SIGN
Deformity of the skull in which it assumes a shpae similar to a lemon. The frontal areas become flatted. This type of anomaly is seen when spina bifida is present.
LYMPHANGIOMA
SEE CYSTIC HYGROMA
Large fluid-containing sac filled w/ lymph, usually located in the region of the neck.
MICROCEPHALY
Unduly small skull and brain; associated with mental dificiency.
MULTICYSTIC (DYSPLASTIC) KIDNEY
Developmental abnormality of the kidney in which the normal renal parenchyma is totally replaced by cysts of varying sizes. If bilateral, it is not compatible with survival.