| خلاصه مقاله | PEDIATRIC SPINE,SONOGRAPHIC APPROCH
spinal dysraphism is the second most common congenital abnormality and ultrasound provides an excellent means for imaging the spine up to three to six months of age.
types of dysraphism include: occult dysraphism, spina bifida cystica and spina bifida aperta. indication for pediatric spine ultrasound include back dimple which is more than 2.5cm from the anus and larger than 5 mm and syndromes that are associated with an increase of dysraphism, include ventricularis terminalis: a small, epandymal lined cavity, limited to the conus or proximal filum and unlike a syrinx, it doesn't extend superiorly.
determination of vertebral level at ultrasonography is done by determination L5-S1 vertebral body and or S2 level.
tethered cord: low position of the conus medullaris below L3 in a neonate and below L2/3 in older patients.
hydromyelia and syringomyelia: abnormal accumulation of CSF, either within the paracentral cavities (syringomyelia) or whithin the central canal (hydromyelia).
dorsal dermal sinus: epithelium-lined tract that extends from the skin to the arachnoid, cauda equina, or spinal cord.
diastematomyelia: an osseous or fibrosis sagittal ridge results in splitiing of the spinal cord(often asymmetric).
caudal regression syndrome: a spectrum of abnormalities involving the trunk and the lower extremities, can present with relatively mild partial agenesia of the sacrococcygeal spine or severe spinal deformity with fusion of lower extremities(syeromelia) and it has two types.
posterior meningocele: consists of CSF-filled sac ,lined with dura and arachnoid that herniate through a dysraphic defect.
myelocele and myelomeningocele: the neural placode and leptomeninges are attached to an open skin defect. |