Breast lipoma

Case contributed by Gerard Carbo
Diagnosis certain


The patient presented with a palpable lump in the right breast. There is no previous history of breast cancer, and no other associated symptoms are reported. The patient is undergoing an initial mammogram and ultrasonography evaluation.

Patient Data

Age: 40 years
Gender: Female

In the right mediolateral oblique (MLO) projection, there is an observed well-circumscribed and hypodense periareolar mass, exhibiting a fatty density. The mass is surrounded by fibroglandular tissue.


In correlation with the mammography findings, the ultrasonography reveals an ovoid-shaped and well-circumscribed hyperechoic mass located in the upper periareolar region of the right breast. The mass is palpable and corresponds to the reported palpable lump by the patient. No internal Doppler flow is detected within the lesion. It should be noted that an additional lesion with similar sonographic characteristics is found adjacent to the previously described mass.

Case Discussion

Typical radiological findings for a breast lipoma.

In mammography, a breast lipoma typically appears as a well-circumscribed, smooth, and encapsulated mass with radiolucent (dark) characteristics. It exhibits a fat density that distinguishes it from other breast tissue. The lipoma may present as a round or oval-shaped lesion with clear margins, and it is often located in the subcutaneous tissue or within the breast parenchyma.

In ultrasonography, a breast lipoma is visualized as a homogeneously hyperechoic (bright) mass with well-defined borders. It typically appears as an ovoid or lobulated lesion that may exhibit acoustic shadowing posteriorly due to its fatty composition. The lipoma is often superficially located, and it may have a smooth contour. Color Doppler imaging usually shows no vascularity within the mass.

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