Homogeneity Parameter in Contrast-Enhanced Ultrasound Imaging Improves the Classification of Abnormal Cervical Lymph Node after Thyroidectomy in Patients with Papillary Thyroid Carcinoma

Figure 2

Twenty-eight-year-old PTC woman had received left thyroidectomy two years ago. ACLNs were detected on the left neck twice by conventional US in consecutive follow-up. (a) ACLN located in level IV: loss of fatty hilum and round shape (6 × 5 mm) in conventional US. None CDFI was shown (Type I). (b) Hypoenhancement on CEUS (13 s after SonoVue injection). (c) Needle was inserted in ACLN. (d) FNA revealed scattered normal lymph cell in a blood cell background. (e) Another ACLN located in level II: loss of fatty hilum and round shape (4 × 4 mm) in conventional US. A normal hilar (type II) pattern is shown in CDFI. (f) Hyperenhancement on CEUS (15 s after SonoVue injection). (g) Needle was inserted in ACLN. (h) FNA diagnosis was metastatic PTC.

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