患者女,30岁。1年前体检发现甲状腺左叶结节,无特殊症状,未予治疗,常规随访,多次行超声检查结节大小无明显变化,为明确诊治来我院就诊。病程中无乏力、消瘦。查体:甲状腺左叶(图1)可触及肿物,乒乓球大小,表面光滑,无压痛,边界清晰,活动度尚可。超声所见:甲状腺左叶中部见实性偏低回声结节,大小约2.4cm×1.9cm×1.5cm, Female patient, 30 years old. A year ago, physical examination found thyroid left lobe nodules, no special symptoms, no treatment, routine follow-up, multiple line ultrasound showed no significant change in the size of the nodules, for a clear diagnosis and treatment to our hospital. No fatigue in the course of the disease, weight loss. Physical examination: left lobe of the thyroid (Figure 1) palpable mass, table tennis size, smooth surface, no tenderness, clear boundaries, activity is acceptable. Ultrasound seen: the middle of the left lobe of thyroid see solid low echo nodules, the size of about 2.4cm × 1.9cm × 1.5cm,