Glossary term
Seroma
Reference only — not medical advice. See disclaimer.
An accumulation of serous fluid (lymphatic fluid and plasma) in a dead space created by surgery, forming a fluid-filled pocket under the skin that presents as a soft swelling, most commonly after procedures such as abdominoplasty or mastectomy. Small seromas may resolve spontaneously with compression garments, whilst larger or persistent ones require aspiration with a needle.