Abstract:
Objective To determine the perfusion pattern of lymphadenopathy in contrast-enhanced ultrasonography (CEUS) under different reference conditions. Methods The CEUS perfusion patterns of 78 superficial lymph node lesions were compared with their pathology results. Time-intensity curves were used for comparison between benign and malignant lymph nodes. Results Inhomogeneous hyperenhancement was the main perfusion pattern (7/17, 41.2%) in metastatic lymph nodes; compared with homogeneous hyperenhancement (2/4,50.0%) in lymphoma, homogeneous hyperenhancement and isoenhancement (6/52,11.5%) in reactive lymph nodes, and circle enhancement (2/4,50.0%) in tuberculosis. Benign lymph nodes showed different mean value, peak intensity and area under the curve compared with their surrounding arteries (
P<0.05). But the differences in mean value, rise time, time to peak, peak intensity and the area under the curve between benign lymphadenopathy and their surrounding tissues were not statistically significant (
P>0.05). Malignant lymph nodes showed different mean value and peak intensity compared with their surrounding arteries and tissues (
P<0.05). The differences in time to peak between malignant lymph nodes and their surrounding tissues were also statistically significant (
P<0.05). Conclusion Different CEUS perfusion patterns are associated with different types of lymph node lesions. Time-intensity curves with surrounding tissues as reference condition offer great values for the differential diagnosis of superficial lymphadenopathy.