Intramuscular lipoma of the subscapularis muscle
Keywords:
Lipoma, Rotator cuff, Axilla, Diagnosis, differential, Magnetic resonance imagingAbstract
CONTEXT: Intramuscular lipomas are benign tumors that infiltrate the muscles. CASE REPORT: We describe the case of a 58-year-old female patient with an axillary lump. The lump was a lipoma inside the subscapularis muscle. It is important to differentiate these lesions from liposarcomas and from other diseases that may present as axillary lumps. The most accurate imaging method for differentiating benign lipomatous tumors from liposarcomas is magnetic resonance imaging, but surgical removal of these intramuscular lesions to confirm the diagnosis is recommended. CONCLUSION: Intramuscular lipomas are a rare cause of benign axillary lumps and should be considered in making differential diagnoses on axillary masses.
Downloads
References
Kind M, Stock N, Coindre JM. Histology and imaging of soft tissue sarcomas. Eur J Radiol. 2009;72(1):6-15.
Murphey MD, Carroll JF, Flemming DJ, et al. From the archives of the AFIP: benign musculoskeletal lipomatous lesions. Radiographics. 2004;24(5):1433-66.
Copeland EM, McBride CM. Axillary metastases from unknown primary sites. Ann Surg. 1973;178(1):25-7.
de Andrade JM, Marana HR, Sarmento Filho JM, et al. Differential diagnosis of axillary masses. Tumori. 1996;82(6):596-9.
Feigenberg Z, Zer M, Dintsman M. Axillary metastases from an unknown primary source. Isr J Med Sci. 1976;12(10):1153-8.
Pangalis GA, Vassilakopoulos TP, Boussiotis VA, Fessas P. Clinical approach to lymphadenopathy. Semin Oncol. 1993;20(6):570-82.
Kransdorf MJ, Bancroft LW, Peterson JJ, et al. Imaging of fatty tumors: distinction of lipoma and well-differentiated liposarcoma. Radiology. 2002;224(1):99-104.
Jaovisidha S, Suvikapakornkul Y, Woratanarat P, et al. MR imaging of fat-containing tumours: the distinction between lipoma and liposarcoma. Singapore Med J. 2010;51(5):418-23.
Crim JR, Seeger LL, Yao L, Chandnani V, Eckardt JJ. Diagnosis of soft-tissue masses with MR imaging: can benign masses be differentiated from malignant ones?. Radiology. 1992;185(2):581-6.
Berquist TH, Ehman RL, King BF, Hodgman CG, Ilstrup DM. Value of MR imaging in differentiating benign from malignant soft-tissue masses: study of 95 lesions. AJR Am J Roentgenol. 1990;155(6):1251-5.
Dawson JS, Dowling F, Preston BJ, Neumann L. Case report: lipoma arborescens of the sub-deltoid bursa. Br J Radiol. 1995;68(806):197-9.
Nisolle JF, Blouard E, Baudrez V, et al. Subacromial-subdeltoid lipoma arborescens associated with a rotator cuff tear. Skeletal Radiol. 1999;28(5):283-5.
Hazrati Y, Miller S, Moore S, Hausman M, Flatow E. Suprascapular nerve entrapment secondary to a lipoma. Clin Orthop Relat Res. 2003;(411):124-8.
Benegas E, Ferreiro Neto AA, Teodoro DS, et al. Lipoma arborescens: caso raro de ruptura do manguito rotador associado à presença de lipoma arborescens na bursa subacromial-subdeltoidea e glenoumeral [Lipoma arborescens: rare case of rotator cuff tear associated with the presence of lipoma arborescens in the subacromial-subdeltoid and glenohumeral bursa]. Rev Bras Ortop. 2012;47(4):517-20.