Epidemiology
A benign lesion of infants and young children that is usually located in the subcutaneous tissue or superficial soft-tissue planes. In infants, the priority is to confirm the diagnosis with the least possible harm to growing tissues.
Basic features
It may be felt as a firm, poorly defined mass, made up of a mix of fat, fibrous tissue, and an immature component.
Usual treatment
Local removal is considered if it grows, causes discomfort, or the diagnosis is uncertain; in typical lesions the approach is individualized.
Outcomes and prognosis
The course is favorable; local recurrences are possible if residual tissue is left behind.