Fig. 2.

Ultrasound images from Case 4.

A 73-year-old woman with history of left breast cancer without axillary metastasis underwent her 10-year surveillance after treatment. There was isolated round shape unilateral lymphadenopathy in her right axilla level I with loss of fatty hilum, MCT of 6.4 mm (cut-off value, 3 mm), L/W ratio of 1.3 (cut-off value, <1.5) and IMCT near 3 times greater than her last exam (cut-off value, ≥2 times) on ultrasound. She had cross-inoculation with a first dose of Vaxzevria and a second dose of Pfizer-BioNTech COVID-19 vaccine 28 days before this ultrasound.