Large breast lipoma

Case contributed by Mohammadtaghi Niknejad
Diagnosis almost certain


Large, painless, soft palpable mass on physical exam of the right breast.

Patient Data

Age: 55 years
Gender: Female

A large, relatively well-defined mass-like lesion with internal diffuse fat and minimal soft tissue density is noted in the UOQ of the right breast, most consistent with lipoma.

Case Discussion

Breast lipomas are benign breast lesions and are classified as BIRADS II lesions. On mammography typically seen as a radiolucent mass with homogeneous fat density and sometimes with minimal soft tissue density. Enlargement of a lipoma is an indication for biopsy, although they rarely undergo malignant transformation and are not associated with an increased risk of developing breast cancer.

Breast hamartoma can be considered in a differential list but usually shows more heterogeneous appearance with scattered areas of soft tissue density, causing a "breast within a breast"  or a "slice of sausage" appearance. Breast hamartomas are also classified as BIRADS II lesions.

How to use cases

You can use Radiopaedia cases in a variety of ways to help you learn and teach.

Creating your own cases is easy.

Updating… Please wait.

 Unable to process the form. Check for errors and try again.

 Thank you for updating your details.