MyPACS.net: Radiology Teaching Files > Case 5280708

never visited OIL CYST
Contributed by: Residents and Faculty Baptist Health System Birmingham Alabama.
Patient: 47 year old female
History: 47 year old female. Screening breast exam detected a "lump" in breast on the right.
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Fig. 1
Findings: There is a lucent lesion in the right breast with a suggestion of spiculation or cicatrization in the surrounding parenchyma. What is your most likely diagnosis? What is your differential diagnosis?
Diagnosis:

oil cyst
DDx:
lipoma, galactocele, and rarely fibroadenolipoma (or mammary hamartoma).

Discussion: Focal fat necrosis is quite common in the breast. Most commonly it is demonstrated incidentally on mammograms, but it can appear as a palpable, sometimes painful mass with associated skin thickening and retraction. There is frequently a history of trauma to the breast, particularly after surgery, and this form of fat necrosis has been termed "post-traumatic oil cyst". The typical appearance of these lesions is a lucency surrounded by distortion and spiculation (simulating a cancer). Calcification may also be present in fat necrosis. Fat necrosis, per se, has no malignant potential.
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Additional Details:

Case Number: 5280708Last Updated: 07-10-2006
Anatomy: Breast   Pathology: Trauma
Exam Date: Access Level: Readable by all users
Keywords: oil cystACR: 030.432

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