Imaging recommendation · Breast

Lactating woman with breast mass, suspected galactocele

Q: What's the alternative imaging for lactating woman with breast mass, suspected galactocele when persistent / atypical?

MG — Diagnostic mammogram if ≥ 30 (no contrast).

Recommended: Breast Ultrasound is the preferred imaging study for lactating woman with breast mass, suspected galactocele. Milk-filled cyst from duct obstruction.

Recommended study

Breast Ultrasound

US No contrast Preferred Breast Outpatient Reviewed 2026-05

Milk-filled cyst from duct obstruction. Most common breast mass in lactating women.

If the default doesn't apply

Persistent / atypical

MG Diagnostic mammogram if ≥ 30 No contrast

Watch-outs

Don't biopsy unnecessarily

Classic appearance + lactating context — aspiration confirms diagnosis if clinical decision needed.

Pearls

Mammography: fat-fluid level pathognomonic but rarely seen.
US: anechoic or hypoechoic mass, variable internal echoes (depends on fat / protein content).
Aspiration produces milk; resolves with breastfeeding cessation.