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  • Make a curved skin incision.
  • Push aside the soft tissue in one layer to uncover the cranium.
  • Cut out a free bone flap with a saw.
  • Insert the operation microscope and open the dura.
  • The tumor is identified in a discolored gyrus centrally in the field. The tumor has a diffuse border towards the normal brain tissue.
  • Biopsy the tumor. Take samples for frozen section and for formalin-fixed examination.
  • All visible tumor tissue should be removed with ultrasound aspirator.
  • Before closure, perform careful hemostasis and rinse the operation field with physiological saline solution until the rinsing water is clear.
  • Stitch the dura along the bone edge.
  • The bone flap should be fixed with three titanium clamps.
  • Make a midline suture for the dura.
  • Close the muscle fascia, subcutis and epidermis in layers.

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