患者 男,37岁。因舌背根部异物3月余,1994年11月23日来院门诊。3个月前吞咽时自觉有异物感,不痛不痒,无出血史,自触表面不平,高于表面,对症处理未见好转。查体:一般情况好,心肺未见异常,头颈部淋巴结无肿大。口腔内未见异常,位于左侧舌背根部见一黄豆大小、边界清楚灰白色高于舌表面的结节,不移动,表面不易剥脱,压之不痛,触之不出血,未见任何分泌物,质硬,表面呈乳头状。无红肿、糜烂及溃疡。当时于局部麻醉行肿物切除术。病理检查:灰白色扁平状肿物,大小0.8cm×0.8cm×0.4cm,表面呈桑叶状,质硬不易切开,经5％硝酸脱钙后切面灰白色。粘膜及肿物有明显界线,并能分 Male patient, 37 years old. Because of tongue dorsal root foreign body more than 3 months, November 23, 1994 to hospital. 3 months ago when swallowing consciously foreign body sensation, insignificant, no history of bleeding, since the touch surface uneven, higher than the surface, no improvement in symptomatic treatment. Physical examination: the general situation is good, no abnormal heart and lung, no swelling of the head and neck lymph nodes. No abnormalities in the mouth, located on the left lingual dorsal root see a soybean size, border clear gray above the nodules of the tongue surface, do not move, the surface is not easy to peel off, the pressure of the pain, no bleeding, no secretions , Hard, papillae surface. No swelling, erosion and ulcers. At the time of local anesthesia for tumor resection. Pathological examination: gray flat mass, the size of 0.8cm × 0.8cm × 0.4cm, mulberry leaves on the surface, the hard hard to cut, after decalcification 5% nitric acid cut gray surface. Mucosal and tumor have obvious boundaries, and can be divided