Fig. 2From: The concept of “Four Walls, Two Poles” in the lesions of the thalamus and ganglion regions: case report and literature reviewCase 1. a The skin incision; b the position of the head raised approximately 30 °C; c the location of the frontal cortex fistula: 2.5 cm in front of the coronal suture and 1 cm beside the midline; d the tumour, the choroid plexus and the body fornix were exposed; e the thalamostriate vein was exposed; f the location of the third ventriculostomyBack to article page