Arnold Chiari malformation, type II

S. Manohar, MD, DMRD

Madurai, India

This is a case demonstrating Arnold Chiari malformation, type II. The 2-D images reveal:

1. Lemon sign with frontal scalloping.

2. Gross hydrocephalus and a small posterior fossa.

4. A large open neural tube defect seen as diverging neural arches in the lumbar region. This is well documented in 2D and 3D imaging. 
 

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