Neuroradiology #43

Clinical Data

2-year-old male:

  • Presented with enlarged skull and suspected hydrocephalus
Indicate the abnormality:

Description:

  • Mild symmetrical dilatation of the supra & infratentorial ventricular system. Crowded foramen magnum with an inferior location of the cerebellar tonsils below the margins of the foramen magnum.

Which of the following statements are correct?

  • Chiari I malformation characterized by a caudal descent of the cerebellar tonsils through the foramen magnum

  • Treatment with posterior decompression is usually reserved for symptomatic patients or those with a syrinx

  • Chiari I malformations may be seen in association with cervical cord syrinx or hydrocephalus

  • Becoming symptomatic is proportional to the degree of descent of the tonsils

  • Abnormal skull base , cervical segmentation anomalies, small cranial vault, and posterior fossa could be resembling Chiari I malformation

  • Excessive brain tissue could represent acquired Chiari malformation

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