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. 2022 Aug 26;42(7):1897–1911. doi: 10.1148/rg.220045

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© 2022 by the Radiological Society of North America, Inc.

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Atypical lobular hyperplasia and radial scar in a 57-year-old woman recalled from screening for an abnormality in the left breast 6 days after receiving the second dose of the Pfizer-BioNTech SARS-CoV-2 vaccine in the left arm. (A, B) MLO (A) and craniocaudal (B) spot-compression tomosynthesis images show architectural distortion (arrow) at the 1-o’clock position. There was no US correlate for the architectural distortion. (C, D) US images of the axilla show a type 6 lymph node (arrow in C), which decreased in size at 8-week follow-up (arrow in D). Stereotactic biopsy of the distortion yielded atypical ductal hyperplasia, while excision yielded atypical lobular hyperplasia and radial scar. — Atypical lobular hyperplasia and radial scar in a 57-year-old woman recalled from screening for an abnormality in the left breast 6 days after receiving the second dose of the Pfizer-BioNTech SARS-CoV-2 vaccine in the left arm. (A, B) MLO (A) and craniocaudal (B) spot-compression tomosynthesis images show architectural distortion (arrow) at the 1-o’clock position. There was no US correlate for the architectural distortion. (C, D) US images of the axilla show a type 6 lymph node (arrow in C), which decreased in size at 8-week follow-up (arrow in D). Stereotactic biopsy of the distortion yielded atypical ductal hyperplasia, while excision yielded atypical lobular hyperplasia and radial scar.