What is the composition of lipomas?

Updated: Jan 30, 2020
  • Author: Ginard I Henry, MD; Chief Editor: Gregory Gary Caputy, MD, PhD, FICS  more...
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Lipomas are benign mesenchymal tumors derived from adipocytes. Microscopically, they are composed of fatty tissue with interlacing muscle fibers. Fine-needle aspiration biopsies of a lipoblastoma contain multivacuolated lipoblasts, myxoid areas, and a plexiform capillary network.Several variants have been described. Adenolipomas, a variation of lipomas that may occur in the breast, often have a marked fibrotic component. They are best regarded as hamartomas. Angiolipomas contain many small vessels.

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