The Reliability of the "Absent Cistern Sign" in Assessing LP Shunt Function

Figure 1: (A) Axial CT scan showing closed basal cisterns, the "absent cistern sign", in the presence of a functioning LP shunt. Figure 1: (B) Axial CT in the same patient showing open basal cisterns due to LP shunt malfunction.

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Figure 1: (A) Axial CT scan showing closed basal cisterns, the "absent cistern sign", in the presence of a functioning LP shunt.	Figure 1: (B) Axial CT in the same patient showing open basal cisterns due to LP shunt malfunction.