Figure 2

(A1–A3): Brain MRI enhancement showed right frontal lobe space occupying lesions with uniform enhancement and clear boundary; (A4): Postoperative brain CT showed that the intracranial lesions were removed completely; (A5): Relationship between intracranial lesions and brain tissue of anterior central gyrus and posterior central gyrus reconstructed by 3D-Slicer; (A6–A7): 3D printing positioning guide; (A8): According to the surgical incision design after 3D positioning guide plate positioning, the circle is the body surface projection of intracranial lesions, the solid line straight incision is the improved small incision, the ruler shows that the surgical incision is about 4 cm, and the dotted line “U” incision is the conventional surgical incision; (A9): The lesion can be seen by cutting the dura mater under transcranial neuroendoscopic; (A10): The lesion was removed cleanly without obvious side injury to the surrounding tissue under transcranial neuroendoscopic; (A11): Completely resected lesions; (A12): The postoperative pathological examination.