Immunohistochemical examination of the tumor revealed positive expressions of S-100 protein, neuron-specific enolase, and vimentin, while there was a lack of immune profiles of actin, α–smooth muscle actin, desmin, CD34, c-kit (CD117), epithelial membrane antigen, and keratin. Epithelial membrane antigen and keratin are markers derived from epithelial tissues, whereas vimentin is a mesenchymal molecule. These staining results of epithelial membrane antigen (negative), keratin (negative), and vimentin (positive) in this tumor indicated that it was of a nonepithelial origin. On the other hand, S-100 protein and neuron-specific enolase are both neurogenic markers, whereas actin, α–smooth muscle actin, and desmin are myogenic ones. Both CD34 and CD117 are molecules well known to exclude a gastrointestinal stromal tumor. Those results gave definitive immune profiles showing that the tumor was of a neurogenic origin rather than a myogenic one or a gastrointestinal stromal tumor.