Forehead Swelling: Not Every Lump Is a Lipoma

Not all forehead swellings are lipomas. A progressively enlarging or pulsatile forehead swelling may be an arteriovenous malformation, also called an AVM.

In this Short, Dr. M. Ram Prabhu explains why vascular swellings need careful diagnosis and planned surgery.

What is an AV malformation?

An arteriovenous malformation is a high-flow vascular anomaly where arteries communicate directly with veins. Unlike a simple lipoma, an AVM can enlarge over time and may bleed significantly if treated casually.

Why AVMs should not be treated like lipomas

A forehead lipoma is usually a soft fatty lump. An AVM may have pulsation, increased blood flow, progressive enlargement, or a vascular feel on examination.

Incomplete treatment can lead to recurrence because the abnormal blood supply remains active.

Evaluation before surgery

Proper evaluation may include:

• Clinical examination.
• Doppler study.
• MRI angiography when needed.
• Planning of feeder vessels and excision strategy.

Surgical principles

Definitive management may involve identifying all feeding vessels, careful ligation of arterial feeders, complete excision, and meticulous hemostasis.

Key takeaway

If a forehead swelling is enlarging, pulsatile, or unusual, do not assume it is a lipoma. Early diagnosis and planned surgical management improve safety and long-term outcomes.