By Girish Fatterpekar, Thomas P. Naidich, Peter M. Som
Sensible and clinically concentrated, mind and backbone Imaging - a identify within the educating documents sequence - provide you with over three hundred attention-grabbing and well-presented instances that will help you higher diagnose any illness of the mind and backbone. specialist within the box, Dr. Girish Fatterpekar, MD makes use of a logical association all through, making referencing tricky diagnoses more uncomplicated than ever ahead of. exact discussions of modern modalities and applied sciences hold you brand new, and demanding diagnostic questions probe your wisdom of the fabric. This detailed, case-based source provide you with a good way to sharpen your diagnostic talents and research for board checks.
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Extra resources for Brain and Spine
Since there are no definite measurement criteria for the size of normal cisterna magna, the diagnosis of an underlying cisternal malformation cannot be based on the size. The abnormalities of the structures that form the boundary of the cisterna magna should thus be considered for a more definite evaluation of retrocerebellar cystic malformations and, in effect, mega cisterna magna. Characteristic Clinical Features Mega cisterna magna is a common entity and accounts for approximately 54% of all cystlike posterior fossa malformations.
Encephalomalacia: Appears as a shaggy-walled cavity with considerable glial reaction. Septations can sometimes be seen within the cavity. Depending on the etiology of the insult and the age at which the insult occurred, additional changes in the brain can be seen. These include cortical thinning, cortical susceptibility, subcortical white matter bright signal intensity foci suggestive of encephalomalacia, “watershed” infarcts, and dystrophic calcification. Suggested Readings Barkovich AJ: Brain and spine injuries in infancy and childhood.
Visual acuity ranges from no light 48 perception to near normal; more than 80% of bilateral cases are legally blind. There is a suggestion of correlation of visual acuity to the optic disc size. Abnormalities related to endocrine dysfunction secondary to hypothalamic/pituitary dysfunction, and developmental delay associated with hypoplasia of the corpus callosum are seen in a majority of the cases. Ophthalmoscopic evaluation demonstrates small optic disc, a pigmented ring defining the area of a putative scleral canal surrounding the disc, and tortuous retinal vessels.