A CASE OF SCHWANNOMA OF THE TONGUE MARGIN

YOSHIBA Sayaka, MORIYA Takashi, SUZUKI Maiko, YASO Atsutoshi, TAKEI Yoshiko, TAKAHASHI Koji, KAMATANI Takaaki, SHIROTA Tatsuo

doi:10.14930/jshowaunivsoc.80.422

A schwannoma, a benign tumor derived from Schwann cells, occurs widely in the myelinated nerve distribution area that involves nerve sheaths running from the cerebral spinal trunk to the peripheral nerves. It often occurs on the tongue in the oral region. Generally schwannomas are smaller than 30mm; there are only a few reports of schwannomas of 30mm or larger. We report a case of a relatively large schwannoma arising in the tongue margin. The patient was a 48-year-old man who had been aware of a tumor on the right tongue margin since childhood, but he did not have it examined as it was asymptomatic. At the time of a dental clinic visit for dental treatment, the patient was found to have a tumor on the right tongue margin he subsequently visited our department in July 2015. At the first consultation, an elastic hard mass, 45mm×38mm, with normal surface mucosa was observed on the right tongue margin. Anticipating possible postoperative lingual movement disorders, his tongue movement, and articulation function were evaluated before surgery, and tongue exercise training was started. In October 2015, the right tongue tumor was removed under general anesthesia. Histopathologically, most of the tumor cells were spindle-shaped cells with nuclear fence-like arrangements; it was an Antoni A, B-type schwannoma with the formation of a Verocay body in which the cells were arranged in bundles，with variegated cell distribution and edematous substrate. As a result of the tongue exercise training before and after surgery, both tongue movement and articulation function were maintained after surgery.

A CASE OF SCHWANNOMA OF THE TONGUE MARGIN

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