from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A moderately severe form of spina bifida in which the meninges protrude, causing a bulge under the skin.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. a form of spina bifida in which a meningeal sac of cerebrospinal fluid protrudes through the skull
from The Century Dictionary and Cyclopedia
- n. In pathology, hernia of the meninges or cranial membranes; cerebral hernia confined to the membranes.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a congenital anomaly of the central nervous system in which a sac protruding from the brain or the spinal meninges contains cerebrospinal fluid (but no nerve tissue)
Spina bifida (also called meningocele or myelomeningocele) is a defect that comes from a problem in the very early development of the unborn child.
gives rise to a hernia of the meninges, which, if accompanied by cerebrospinal fluid in any quantity, causes a large and peculiarly shaped tumor called meningocele (Fig. 96).
Larkin and Jones 6.212 mention the removal of a meningocele and a supernumerary limb from an infant of four months.
The guess may be hazarded that cephalhematoma, hydrocephalus, meningocele, nevi, or an excessive amount of vernix caseosa were the conditions indicated, but a wider acquaintance with the meaning of the cuneiform characters is necessary before any certain identification is possible.
Larkin and Jones mention the removal of a meningocele and a supernumerary limb from an infant of four months.
Occasionally a deficiency in the osseous material of the cranium or an abnormal dilatation of the fontanelles gives rise to a hernia of the meninges, which, if accompanied by cerebrospinal fluid in any quantity, causes a large and peculiarly shaped tumor called meningocele.
_ -- The _meningocele_ is commonest in the occipital region, where it escapes through a cleft in the bone between the foramen magnum and the occipital protuberance (Fig. 197).
A meningocele, as it contains no nerve elements, may be translucent.
It is, however, often difficult to distinguish between a meningocele and meningo-myelocele.
As it frequently lies in a gap in the skull, it may be connected by a pedicle with the dura mater, and is liable to be mistaken for a meningocele.