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Figure 1: (a) The skin incision is usually C shape (vertical narrow arrow), the pericranium is cut C shape in a direction apposite to the direction of skin incision (horizontal thick arrow). The bone flap (asterisk) is elevated after dissecting the dura from coronal sutures and making two parallel osteotomies around the place of routine endoscopic procedure burr hole, 2-2.5 cm off midline and 1 cm in front of coronal suture, dura is opened with cruciate incision (b) and is sutured in a watertight manner. The bone flap is replaced at the location of bone defect

Figure 1: (a) The skin incision is usually C shape (vertical narrow arrow), the pericranium is cut C shape in a direction apposite to the direction of skin incision (horizontal thick arrow). The bone flap (asterisk) is elevated after dissecting the dura from coronal sutures and making two parallel osteotomies around the place of routine endoscopic procedure burr hole, 2-2.5 cm off midline and 1 cm in front of coronal suture, dura is opened with cruciate incision (b) and is sutured in a watertight manner. The bone flap is replaced at the location of bone defect