A breast lipoma is a benign breast lesion and is classified as a BIRADS II lesion.
Lipomas are mostly asymptomatic and coincidentally discovered on routine mammography. Patients may present with a painless palable breast lump which is soft and mobile. In these cases the diagnosis is clinically obvious.
Skin tethering or fixation are not features of lipomas.
Lipomas are benign mesenchymal tumours that are composed of mature adipose tissue
Classically it appears as a fat composed lesion seen predominantly in the subcutaneous plane; however can be seen anywhere in the breast. Ideally lipomas measure anywhere upto 20 cms in size.
Typically seen as a radiolucent mass with no calcification (in rare situation there may be areas of fat necrosis presenting as calcification). They may have a thin, peripheral, fluid density capsule. Mammographic detection may be easier in a dense breast. In the vast majority of cases lipoma is incidentally seen on routine screening.
May be seen as a rounded lesion that is iso-echoic or at times slightly hyperechoic to surrounding fat. Occasionally a lipoma can be hypoechoic 4. Multiple thin echogenic sepations may be seen running parallel to the skin surface. The lipoma can be readily distinguished from a hamartoma by the ultrasound and mammogram appearances. Compressibility of the lesion can also be demonstrated on ultrasonography.
These lesions are also found in males.
Treatment and prognosis
These lesions are rarely a diagnostic or imaging dilemma. Enlargement of a lipoma is an indication for biopsy. They rarely undergo malignant transformation and are not associated with an increased risk of developing breast cancer.
- 1. Lanng C, Eriksen BØ, Hoffmann J. Lipoma of the breast: a diagnostic dilemma. Breast. 2004;13 (5): 408-11. doi:10.1016/j.breast.2004.04.011 - Pubmed citation
- 2. Dähnert W. Radiology Review Manual. Lippincott Williams & Wilkins. (2011) ISBN:1609139437. Read it at Google Books - Find it at Amazon
- 3. O'Brien W, Sr. WT. Top 3 Differentials in Radiology, A Case Review. Thieme Medical Pub. (2009) ISBN:1604062266. Read it at Google Books - Find it at Amazon
- 4. Cardeñosa G. Clinical breast imaging, a patient focused teaching file. Lippincott Williams & Wilkins. (2006) ISBN:0781762677. Read it at Google Books - Find it at Amazon
- 5. Eurorad teaching files : Case 4894 - complicated by haemorrhage
Synonyms & Alternative Spellings
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|Lipoma of breast||✗|
|Lipoma of the breast||✗|