BI-RADS v2025 Adds Nonmass Lesions to Breast Ultrasound Lexicon

A pictorial review describes how the BI-RADS v2025 Manual formally incorporates nonmass lesions (NMLs) into the breast ultrasound lexicon, expanding beyond discrete masses. The article reports that NMLs span benign, high-risk, and malignant conditions with an overall high malignancy rate warranting tissue diagnosis, and notes their identification can be challenging due to lack of discrete margins or shape and technical factors such as patient positioning and operator dependence. The review classifies cases by distribution and highlights multimodality correlation with mammography, MRI, contrast-enhanced mammography, and FDG PET-CT, along with pitfalls relevant to screening.

Most relevant for: Relevant to interpretation of screening and diagnostic breast ultrasound examinations where nonmass lesions are identified.

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