Marchal G, Oyen R, Verschakelen J, Gelin J, Baert A L, Stessens R C
J Ultrasound Med. 1985 Aug;4(8):417-9. doi: 10.7863/jum.1985.4.8.417.
Normal lymph nodes appear sonographically as somewhat flattened hypoechogenic structures. Chronic inflammation, obesity, and degenerative changes leading to benign fatty replacement of lymphoid tissue are responsible for the variations seen with high-resolution ultrasonography. These fatty deposits, beginning in the center of the lymph node and progressing toward the periphery, are easily recognized as highly reflective defects in the hypoechogenic lymphoid tissue.
正常淋巴结在超声检查中表现为略呈扁平状的低回声结构。慢性炎症、肥胖以及导致淋巴组织良性脂肪替代的退行性改变是高分辨率超声所见变化的原因。这些脂肪沉积从淋巴结中心开始并向周边进展，在低回声淋巴组织中很容易被识别为高回声缺损。
