Summary:

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Accessory breast tissue, also known as ectopic, extra or Axillary Breast Tissue and Armpit Fullness, is a common condition where breast tissue develops outside the normal breast area — most often in the armpit (axilla), though it can appear along the chest or even near the collarbone. This tissue can enlarge, become tender, or change with hormonal cycles, causing pain, swelling, or cosmetic concern. In some cases, accessory tissue may develop lumps or, rarely, breast cancer, just like normal breast tissue.

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Understanding Accessory Breast Tissue 

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Accessory breast tissue forms during embryonic development, when the normal breast tissue ridge (milk line) fails to regress completely. The result is extra glandular or fatty tissue that behaves like normal breast tissue — often becoming more noticeable during puberty, pregnancy, or lactation.

 

Patients typically report:

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• A bulge or fullness in the armpit that becomes tender before or during menstruation

• Discomfort when wearing fitted clothing or bras

• Asymmetry between the two sides

• Cosmetic dissatisfaction or self-consciousness

 

 

While usually harmless, persistent or enlarging accessory breast tissue can cause both physical discomfort and emotional distress.

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When to Consider Removal

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Surgical removal may be recommended if:

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• The area causes pain or swelling, especially with hormonal changes

• There is visible fullness affecting arm movement or clothing fit

• Imaging (ultrasound or mammogram) shows abnormal or complex tissue

• There is a cosmetic concern about symmetry or appearance

 

At Breast & Wellness, each case is carefully assessed using clinical examination and imaging to confirm the diagnosis and plan the most suitable treatment.

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The Procedure

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• Anaesthesia:

  The operation is usually performed under general anaesthetic for comfort, though smaller areas may be removed under local anaesthetic.

• Incision:

  A hidden incision is made in the natural crease of the armpit or along a skin fold to minimise visible scarring.

• Removal:

  The accessory tissue — whether glandular, fatty, or mixed — is carefully removed while preserving nearby nerves and lymphatic channels.

  If required, liposuction may be combined to smooth the contour and achieve a natural result.

• Closure:

  The incision is closed with dissolvable sutures, and a small dressing is applied. Drains are rarely needed.

• Duration:

  The procedure typically takes 45–90 minutes, depending on the amount of tissue. Most patients go home the same day.

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After the Procedure

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• Mild swelling or bruising in the armpit is common for a few days.

• A support garment or light compression dressing may be used to reduce swelling and support the healing area.

• You can shower from the day after surgery, and dissolvable sutures do not need removal.

• Avoid strenuous upper-body activity for 1–2 weeks.

• Driving is permitted after your first postoperative review when movement is comfortable.

• Most patients return to normal activities within a few days, with excellent long-term cosmetic results.

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Possible Risks and Side Effects

 

Although accessory breast tissue removal is a safe procedure, possible risks include but not limitted to:

 

• Temporary swelling or bruising

• Seroma (fluid collection) — uncommon

• Minor numbness or tightness in the armpit

• Infection (rare)

• Small contour irregularities (occasionally corrected later)

• Visible scar

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How to Improve Scar Healing

 

 

• Scar Awareness

Unfortunately, regardless of the surgical technique used for removing accessory breast tissue, a permanent scar is one of the main considerations with this operation. The scar usually fades and softens over time, but good care can greatly improve its final appearance.

 

• Scar Massage

Once your wound has healed, gently massage the scar daily using a silicone gel or cream such as Nokori or Strataderm. Regular massage improves circulation, softens the scar, and prevents tightness.

 

• Sun Protection

Avoid direct sunlight on the scar for at least 6–12 months. UV exposure can cause darkening and slow healing. Cover the area or apply sunscreen (SPF 50+) when exposed.

 

• Support and Tension Reduction

Continue wearing your surgical bra or compression garment as recommended. Proper support reduces skin tension and helps the scar heal flatter and less noticeable.

 

• Ongoing Care

If you notice thickening, redness, or discomfort, please contact us. Our team may recommend advanced scar treatments such as laser therapy, microneedling, or steroid injections to optimise healing and cosmetic appearance.

 

• Consistency Matters

Gentle, regular care and protection over time lead to smoother, softer, and more refined scars.

 

Benefits of Accessory Breast Tissue Removal

 

• Relief from pain, swelling, and discomfort

• Improved arm mobility and comfort in clothing

• Balanced, smoother contour of the chest and armpit

• Boost in confidence and body image

• Enables early detection of any future breast changes by removing confusing accessory tissue

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Key Points

 

• Accessory breast tissue is a common cause of armpit fullness or tenderness

• May enlarge or become painful during hormonal changes

• Surgical removal is safe and effective for comfort and cosmetic improvement

• You can shower from the day after surgery

• Driving permitted after your first postoperative review

• Usually a day procedure with quick recovery and lasting results

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