This case is a right-handed 40-year-old woman. A right parietal tumor was detected incidentally. The tumor is located posterior to the sensory area. Low-grade glioma was suspected according to the preoperative radiological examinations.
The operation was performed under a general anesthesia. The patient was laid in a left lateral position. Her head was rotated slightly to the left and fixed with vertex-up position. A U-shaped skin incision was made as shown in Figure 1. We performed two burr holes and made a 3x4 cm bone flap. The dural incision is also shown in Figure 1. The brain surface was slightly pale and voluminous.
At first, we confirm the location of the tumor by the neuro-navigation system. Then we removed the tumor, though the tumor margin was not clear. The rapid diagnosis was a diffuse astrocytoma as expected. The ventricular system was not opened.
We confirmed no blood oozing from the resected cavity wall. Then we sutured the dura mater water-tightly and fixed the bone flap with fixators. The skin was sutured in due form.
On the MR images immediately after the operation, about 95% of the tumor was resected. Only a small amount of the residual tumor was recognized at the anterior side of the removal wall.
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