Fig. 4From: The concept of “Four Walls, Two Poles” in the lesions of the thalamus and ganglion regions: case report and literature reviewCase 2. a The skin incision; b the bony window was exposed, and the approximate location of the abscess was determined by the squamous suture; c the abscess; d part of the wall of the abscess was removed; e the ventral surface of the abscess was exposed; f the operative field was exposed after the operationBack to article page