Intramuscular Lipoma
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![SoftTissue_Lipomatous_IntramuscularLipoma6A.jpg](/slides-13/slides/SoftTissue_Lipomatous_IntramuscularLipoma6A.jpg)
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Intramuscular lipomas present as slow-growing, painless masses involving the large muscles of the thigh, shoulder and upper arm in adults. When the involved muscle contracts, they become more apparent as a spherical mass. They are uncommon in children and difficult to distinguish from diffuse lipomatosis and lipoblastomatosis in that age group. The image shows mature fat cells diffusely infiltrating skeletal muscle.