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患者,女性,52岁。舌下肿物二年,近一个月明显增大,同时伴有疼痛而就诊。查体所见:于左侧舌根部可触及较硬近圆形肿物,大小约4.0cm × 4.0cm、不活动。局部口腔粘膜可见灰白色溃疡。采用探头频率7.5兆赫,经皮舌骨上区进行超声检查:于左侧口底可探及 3.8cm × 3.5cm大小低回声肿物,边界尚清,位置固定,内部可探及少量低速的动脉血流（图1）。颈部未探及肿大淋巴结。超声诊断:左侧口底实质性肿物,恶性可能性大。术后病理诊断:口底低分化鳞癌。
Patient, female, 52 years old. Sublingual two years, nearly a month increased significantly, accompanied by pain and treatment. Physical examination findings: in the left base of the tongue touches hard and nearly circular tumor, the size of about 4.0cm × 4.0cm, inactive. Local oral mucosa visible gray white ulcers. Using a probe frequency of 7.5 MHz, ultrasonography was performed on the periatal hyoid area: a 3.8 cm × 3.5 cm hypoechoic mass was found on the left floor of the mouth, the border was clear, the location was fixed, and a small number of low-speed arteries were probed inside Blood flow (Figure 1). Neck not explored and enlarged lymph nodes. Ultrasound diagnosis: the left side of the bottom of the substantive tumor, the possibility of malignant. Postoperative pathological diagnosis: poorly differentiated oral squamous cell carcinoma.