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. 2020 May 8;162(8):1957–1965. doi: 10.1007/s00701-020-04359-w

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Fig. 1 — Series of pictures that show the main stages of the simulator assembly. a The work space for the simulator assembly. b The calf’s brain is placed against the convexity of the skull cap. c Injection of tumor masses in the frontal and occipital lobes from inferior. d The skull base is filled up with an aspic water solution. Then, the inverted skull cap is placed on the skull base and both parts are glued together using hot glue