[Syringomyelia: diagnostic value of magnetic resonance and computed tomography in 5 cases]. / Siringomeilia: valor diagnóstico de la resonancia magnética y la tomografía computadorizada en cinco casos.

We present five cases of Syringomyelia, three of which are associated with Arnold-Chiari malformation, establishing a comparison between the diagnostic effectivity of CT scan and Nuclear Magnetic Resonance (NMR). In all five cases the lesion was detected by NMR, but not by CT scan. The advantages of NMR over CT scan were evaluated concluding that NMR is more sensible and should be of first choice in the diagnosis of Syringomyelia, permitting also, a better study of the extension of the cavities as well as its control after surgical treatment.

[Convulsions and encephalopathy as initial manifestations of cyanocobalamin deficiency, without hematologic changes]. / Convulsiones y encefalopatía como manifestación inicial del déficit de cianocobalamina, sin alteraciones hematológicas.

A case of deficiency of cobalamin coenzyme synthesis whose first manifestation was encephalopathy with seizures and no trace of megaloblastic anemia is presented. After a while, signs of posterior cord and polyneural disfunction were detected. We highlight the rareness of the case and the difficulty of the diagnosis because of the discrepancy between neurologic and hematologic signs, as well as the need for early diagnosis which is an important factor for observing therapeutic response.