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Shunt malfunction (CT)

Axial images taken at two different levels on a given patient with dysmorphic brain and ventricles (A, B) demonstrate a right parietal ventricular catheter coursing anteriorly and crossing the midline into the left lateral ventricle. These ventricles are decompressed. Several months later, the same patient presents with headaches and vomiting. CT images taken at similar levels (C, D) show stable position of the catheter, but the ventricles are enlarged. This shows clinical and radiographic evidence for shunt malfunction. (Contributed by Dr. Gomez-Hassan.)