Figure 2.

28-year-old female with palpable unilateral sopraclavicolar adenopathy noted 3 days after receiving the first dose of the AstraZeneca COVID-19 vaccine in her left deltoid muscle. (a) B-mode sonogram image shows 2 round hypoechoic lymph nodes with hilum absence. (b) SMI images show central and peripheral vascularization. (c) After 2 weeks, sonogram image shows the restoration of normal pattern of the smaller lymph node whereas the other node presents asymmetric cortical thickening but with hilum reappearance. (d) After 1 month, the cortical thickening appears uniform, with hilum evidence and normal vascularization.