Reoperation as a Result of Raised Intracranial Pressure Associated with Cyst Formation in Tumor Cavity after Intracranial Tumor Resection: A Report of Two Cases

Figure 2

Imaging results for Case 2. (a)-(b) MRI showing sphenoid ridge meningioma. (c) CT revealing cyst formation in the tumor resection cavity 6 days after tumor resection. The arrow indicates the narrow roof region of the tumor resection cavity, where the “valve”-like structure is located. (d) Recommencement of effusion in the tumor cavity 1 week after the reoperation. The arrow indicates that the roof region of the tumor resection cavity became widened. (e)–(g) MRI showing disappearance of cyst formation in the tumor resection cavity 10 months after the reoperation.

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