Microscopic findings of the tumor. (A) Two different components were recognized in the tumor. (B) Histological examination of the brown-red lesion with a cyst demonstrating a nest of neoplastic cells (Zellballen) containing finely granular cytoplasm and enlarged nuclei. (HE stain × 200). (C) The whitish lesion revealed the intersecting bundles of Schwann cells contained scattered ganglion cells. The ganglion cells had plump cytoplasm (HE stain × 100).