Lipoblastoma and lipoblastomatosis in children.

Lipoblastoma and lipoblastomatosis are rare mesenchymal benign tumors of embryonal white fat. They are found primarily in children less than 5 years of age. This tumor presents in two forms: a localized well-circumscribed lesion (lipoblastoma), or a multicentric type (lipoblastomatosis). The authors presents three cases, two of them with a buttock lesion, the last with a paravertebral one. It is recommended a complete but conservative excision of the tumor because there is a natural tendency to involution, although in the first year of life a local reexcision for recurrence is sometimes described.