Diagnostic ultrasound ( PDFDrive )

CHAPTER 21 The Breast 763
B
A
C
FIG. 21.3 Dense Breast Tissue: Radiographic-Sonographic Correlation. Radiographically dense (water density) tissue on mammograms (A)
can correspond to two different types of tissue on sonography: (B) almost-isoechoic glandular tissue, and (C) intensely hyperechoic interlobular
stromal ibrous tissue.
A
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*
*
*
*
*
*
*
*
* * * * *
*
*
IMPL
2 N2–5 RAD
FIG. 21.4 Water Density Breast Tissue. Most water density tissue
on mammography is not pure ibrous or glandular tissue, but a mixture
of hyperechoic interlobular stromal ibrous tissue and isoechoic glandular
or loose periductal and intralobular stromal tissue. Note that the lobar
duct is mildly ectatic (arrows). The round or taller-than-wide isoechoic
elements (*) within the peripheral segments of the mammary zone
represent epithelial and loose stromal tissues within terminal ductolobular
units (TDLUs). Note that TDLUs are more numerous and prominent
anteriorly than they are posteriorly.
RT 900 2B RAD N 3, 4
FIG. 21.5 Breast Atrophy. With advancing age, and particularly after
full-term pregnancy and breastfeeding, the ibroglandular elements of
the breast regress more rapidly in the areas of the mammary zone
(arrows) that lie between Cooper ligaments than in the area within the
ligaments. This eventually can leave much or all of the residual breast
tissue entrapped within Cooper ligaments (*).