What is the significance of calcifications described as "clustered" and "pleomorphic" on mammography?

• A. Clustered calcifications or pleomorphic patterns raise suspicion for malignancy and typically warrant biopsy; benign patterns include vascular or popcorn-like calcifications.
• B. These patterns are always benign.
• C. They indicate infection.
• D. They indicate prior radiation changes.

Answer: (A)

Clustered calcifications are many tiny deposits gathered in a small area, and pleomorphic means they vary in shape and size with irregular margins. When these features occur together, they point to an abnormal, potentially malignant process such as ductal carcinoma in situ or early invasive cancer, where multiple microcalcifications arise in a disorganized way inside ducts or tumors. The close clustering and irregular shapes make benign explanations less likely, so this pattern raises concern and typically leads to a biopsy to obtain a tissue diagnosis. For contrast, benign patterns include calcifications that run along a blood vessel (vascular) or large, well-defined popcorn-like calcifications seen with some fibroadenomas.