Patient Data
Crowding of foramen magnum contents, suggestive of tonsillar ectopia (Chiari I malformation).
Mildly dilated ventricular system.
Midline bone defect at the cranial vault.
Tonsillar descend through foramen magnum, representing Chiari I malformation.
Focal midline vascular channels in the scalp connected to superior sagittal sinus by a traversing vessel through a midline cranial vault defect, representing sinus pericranii.
Mildly dilated ventricular system.
Extensive syrinx involving the imaged cervical and dorsal segments of the spinal cord.
Case Discussion
Imaging appearances of Chiari I malformation with extensive cervico-dorsal syrinx and sinus pericranii.
The most common complication of Chiari I is syringomyelia seen in 25-50% and most commonly seen in the cervical cord. Other less common complications include hydrocephalus.
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