We describe a unique case of a sublingual-space schwannoma presenting as a painless, 3 x 2-cm enlarging mass in the oral cavity of a 63-year-old man. Computed tomography demonstrated a distinct, well-encapsulated mass in the right side of the floor of the mouth. Findings on fine-needle aspiration cytology were consistent with a pleomorphic adenoma. Transoral excision was performed. Intraoperatively, the mass appeared to involve the nerve to the mylohyoid muscle. Upon removal, the gross tumor measured 4.4 x 3.5 x 2.5 cm. On microscopic examination, the spindle-cell neoplasm was found to be consistent with a schwannoma. Schwannomas of the sublingual space are exceedingly rare. Moreover, to the best of our knowledge, this case represents the first published occurrence of a schwannoma that arose from the mylohyoid nerve.
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机译：我们描述了一个舌下空间神经鞘瘤的独特案例，该病例在一个63岁男性的口腔中表现为无痛的3 x 2 cm肿块。计算机断层扫描显示在口腔底部的右侧有明显的，被良好包封的肿块。细针穿刺细胞学检查的结果与多形性腺瘤一致。经口切除。术中，肿块似乎累及了肌舌肌的神经。切除后，肉眼可见的大小为4.4 x 3.5 x 2.5 cm。在显微镜下检查，发现梭形细胞瘤与神经鞘瘤一致。舌下空间的神经鞘瘤极为罕见。而且，据我们所知，该病例代表了首次出现的神经肌肉瘤引起的神经鞘瘤。
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