| spina bifida | A congenital limited defect in the spinal column, characterised by the absence of the vertebral arches through which the spinal membranes and spinal cord may protrude. (27 Sep 1997) |
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| spina bifida aperta | A bony defect in the vertebral column through which the meningeal membranes that cover the spinal cord and part of the spinal cord protrude. An alternative term is meningomyelocele. (12 Dec 1998) |
| spina bifida cystica | A bony defect in the vertebral column through which the meningeal membranes that cover the spinal cord and part of the spinal cord protrude. An alternative term is meningomyelocele. (12 Dec 1998) |
| spina bifida manifesta | A bony defect in the vertebral column through which the meningeal membranes that cover the spinal cord and part of the spinal cord protrude. An alternative term is meningomyelocele. (12 Dec 1998) |
| spina bifida occulta | Literally, a hidden cleft in the spine. A bony defect in the vertebral column which remains hidden, covered by skin (12 Dec 1998) |
| migraine without headache | A classic migraine episode in which the teichopsia is not followed by a headache. Synonym: migraine without headache. (05 Mar 2000) |
| without | Unless; except; introducing a clause. "You will never live to my age without you keep yourselves in breath with exercise, and in heart with joyfulness." (Sir P. Sidney) Now rarely used by good writers or speakers. Source: Websters Dictionary (01 Mar 1998) |
| subluxation without erosion | <radiology> Systemic lupus erythematosis, Jaccoud's (12 Dec 1998) |
| spinal bifida | A congenital defect in which the neural arches fail to close, so exposing the contents of the spinal canal posteriorly. Usually occurring in the lumbosacral region (lower back) of the spine. (27 Sep 1997) |
| communicating hydrocephalus | Type of hydrocephalus in which there is an abnormality in cerebrospinal fluid absorption; there is no obstruction to cerebrospinal fluid flow in the ventricular system or where the cerebrospinal fluid passes into the spinal canal. (05 Mar 2000) |
| congenital hydrocephalus | Hydrocephalus due to a developmental defect of the brain. Synonym: primary hydrocephalus. (05 Mar 2000) |
| postmeningitic hydrocephalus | Ventricular dilation following meningitis and secondary to obstruction of cerebrospinal fluid pathways. (05 Mar 2000) |
| posttraumatic hydrocephalus | Ventricular dilation following injury, due either to impaired circulation and/or absorption of cerebrospinal fluid or due to loss of brain substance (h. Ex vacuo). (05 Mar 2000) |
| primary hydrocephalus | Hydrocephalus due to a developmental defect of the brain. Synonym: primary hydrocephalus. (05 Mar 2000) |
| secondary hydrocephalus | An accumulation of fluid in the cranial cavity, due to meningitis or obstruction to the venous flow. (05 Mar 2000) |