On mammography, which tissue pattern can obscure lesions due to high density?

On mammography, which tissue pattern can obscure lesions due to high density?

• A. Dense fibroglandular tissue
• B. Fatty replaced tissue
• C. Calcifications only
• D. Scar tissue from prior surgery

Answer: (A)

Dense fibroglandular tissue is radiodense on mammography, so both the background tissue and potential lesions appear white. When the breast is dense, there is less contrast between a lesion and the surrounding tissue, making small masses harder to detect. Fatty tissue, by contrast, is radiolucent (darker), so lesions tend to stand out more. Calcifications show up as bright spots and can often be seen even within dense tissue, while scar tissue can be dense but is typically a localized change rather than the widespread high-density background that masks other findings. Thus, the pattern most likely to obscure lesions due to high density is dense fibroglandular tissue.

Dense fibroglandular tissue is radiodense on mammography, so both the background tissue and potential lesions appear white. When the breast is dense, there is less contrast between a lesion and the surrounding tissue, making small masses harder to detect. Fatty tissue, by contrast, is radiolucent (darker), so lesions tend to stand out more. Calcifications show up as bright spots and can often be seen even within dense tissue, while scar tissue can be dense but is typically a localized change rather than the widespread high-density background that masks other findings. Thus, the pattern most likely to obscure lesions due to high density is dense fibroglandular tissue.