A lipoma is a slow-growing fatty lump usually situated between the skin and the underlying muscle layer. It is not cancerous and most often harmless. Treatment is usually not necessary, but can be removed if the patient finds it painful, bothersome or it continues to grow.
People often confuse lipomas with cysts. Cysts are filled with fluid, located close to the skin surface and sometimes can be drained. Lipomas consist of fat cells, are located deeper below the skin surface and require surgery for removal.