These benign fatty tumors are removed because they are unsightly, uncomfortable or enlarging.
These tumors are typical in appearance: soft to rubbery, not fixed to skin or underlying structures, and slow growing. If there is skin change, ulceration, dimpling or fixation, they should be biopsied to rule out a malignant liposarcoma. Liposarcomas of the skin are usually intradermal and not like lipomas. Liposarcomas arising as malignant tumors are found most often in deeper tissues such as muscle or in the back of the abdomen.
Malignant transformation of a lipoma to a liposarcoma is rare. If there is concern about a lipoma being malignant, then an excisional biopsy or fine needle biopsy can be done.
Once the decision is made to remove the lipoma, it can be done by direct excision which leaves a scar of varying length; liposuction, which will leave some cells behind, or laser melting which may also leave some cells behind. However, this does not occur so often as to be an inconvenience, since the lipoma is slow growing and another procedure can be done. Removal through laser or liposuction, my preference being laser, leaves only a 5 mm scar which can be remote from the lipoma and hidden in a skin crease if possible.
If a patient has multiple small lipomas,which many do, on the arms, chest, trunk and legs, surgical excision leaves so many scars that patients want an alternative, less scarring treatment, even if it does have some trade-offs. Even debulking multiple lipomas without complete removal is worthwhile because it is not disfiguring. Many patients with familial lipoma histories keep getting lipomas. This problem can be controlled with laser melting.