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Figure 2: (a and b); first view of the tumor; (a) under white light and (b) under yellow filter. It shows the tumor is brilliantly enhanced under the yellow filter. The adjacent dural enhancement can also be appreciated. (c) first view of the cochlear nerve at the inferior border of the tumor. (d) the same field under yellow filter, which shows that the nerve is not enhanced but the tumor is enhanced. (e) first view of the facial nerve. The dissector is on the nerve. The integrity of the nerve was ascertained by the stimulation obtained using a stimulator dissector. (f) the same view under yellow filter, which shows the nerve is not enhanced

Figure 2: (a and b); first view of the tumor; (a) under white light and (b) under yellow filter. It shows the tumor is brilliantly enhanced under the yellow filter. The adjacent dural enhancement can also be appreciated. (c) first view of the cochlear nerve at the inferior border of the tumor. (d) the same field under yellow filter, which shows that the nerve is not enhanced but the tumor is enhanced. (e) first view of the facial nerve. The dissector is on the nerve. The integrity of the nerve was ascertained by the stimulation obtained using a stimulator dissector. (f) the same view under yellow filter, which shows the nerve is not enhanced