Imaging recommendation · Breast

Oil cysts / dystrophic calcifications post-surgery or trauma, suspected fat necrosis

Q: What's the alternative imaging for oil cysts / dystrophic calcifications post-surgery or trauma, suspected fat necrosis when atypical features / concerning mass?

MRI — MRI Breast (iv contrast).

Recommended: Diagnostic Mammogram + targeted Ultrasound is the preferred imaging study for oil cysts / dystrophic calcifications post-surgery or trauma, suspected fat necrosis. Common after lumpectomy, reduction mammoplasty, trauma.

Recommended study

Diagnostic Mammogram + targeted Ultrasound

MG No contrast Preferred Breast Outpatient Reviewed 2026-05

Common after lumpectomy, reduction mammoplasty, trauma. Spectrum from oil cysts to dystrophic calcifications to mass-like lesion.

If the default doesn't apply

Atypical features / concerning mass

MRI MRI Breast IV contrast

Watch-outs

Can mimic recurrence in post-treatment breast

Comparison with prior imaging and surgical history essential; biopsy if equivocal.

Pearls

Oil cyst with rim calcification = pathognomonic.
Dystrophic 'egg-shell' calcifications evolve over months-years.
MRI: variable T1 (high if fatty), variable enhancement — can mimic malignancy.