Lipoblastoma is a rare, benign, encapsulated tumour arising from embryonic white fat. 

It occurs primarily in infancy and early childhood (more than 90% before age 3). It most often occurs in the extremities and trunk, although it can be seen in other areas 1. The entity was originally described as an infiltrating anterior chest wall mass. 

Imaging features are non-specific. Lipoblastomas is classically a predominantly fatty mass with well-defined margins. However, it may have myxoid components that predominate and that can also be enhancing. 

Lipoblastomas can look very much like a liposarcoma, but liposarcoma is extremely rare in children (0.08% occur below age 10) 2.

Lipoblastomas have traditionally been treated with excision, although this practice has been called into question. There is a recurrence rate of up to 20% with no recorded case of metastasis. Some cases have matured into lipomas.3

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rID: 25956
Synonyms or Alternate Spellings:
  • Lipoblastomas

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