Oil cyst - breast

Case contributed by Dr MT. Niknejad

Presentation

History of right breast trauma. Palpable mass on physical exam in the trauma site.

Patient Data

Age: 40 years
Gender: Female

A 35x25 mm well defined oval shaped fat density lesion is noted at the upper inner quadrant of the right breast in the trauma site

An oval shaped fat density lesion at the upper inner quadrant of the right breast.

Case Discussion

Regarding the history of trauma, features on mammography are compatible with oil cyst that refer to benign breast lesion (BI-RADS 2) where an area of focal fat necrosis becomes walled off by fibrous tissue.

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