Toddler who is fussy and crying

CT of ventriculoperitoneal shunt malfunction
Axial T2 MRI without contrast of the brain (above) obtained 2 months ago shows normal ventricular size with a VP shunt in place. Axial CT without contrast of the brain (below) shows interval marked dilation of the lateral and third ventricles with transependymal flow of cerebrospinal fluid. The VP shunt series showed no radiographic abnormality of the VP shunt.

The diagnosis was VP shunt malfunction due to occlusion of the VP shunt.