A lipoma usually occurring in the extremities of young children (usually boys). It is characterized by lobules of adipose tissue, separated by fibrous septa. The adipose tissue is composed of mature adipocytes and lipoblasts. The lipoblasts may be scarce, depending on the age of the patient. The disease is lipoblastoma (Monarch Disease Ontology term MONDO_0016611). Also known as: embryonic lipoma, fetal lipoma, foetal lipoma, infantile lipoma.