Gigantomastia: causes, symptoms and surgical solutions

Gigantomastia is a medical condition, not a simple aesthetic issue. It is defined as an abnormal and disproportionate increase in breast volume relative to the rest of the body, with a real physical impact on the patient.

There is no universal bra size from which it can be stated that a woman has gigantomastia. What the specialist really assesses is the combination of several factors:

• The weight of the tissue removed (usually above 600 g and up to 1.5 kg per breast).
• The disproportion of the breast relative to body constitution.
• Breast sagging (ptosis) and the degree of flaccidity.
• Functional impact: pain, movement limitation and impact on daily life.

Therefore, two patients with an apparently similar cup size may present very different clinical situations. Having naturally large breasts is not the same as suffering from gigantomastia: the difference lies in the disproportion and the impact on health.

The sustained excess breast weight creates a constant overload on the spine and shoulders. The most common signs that suggest gigantomastia are:

• Chronic pain in the neck, back and shoulders.
• Deep marks on the shoulders from bra pressure.
• Postural problems and spinal deviations.
• Irritation and chafing in the inframammary fold (dermatitis, fungi).
• Difficulty exercising and performing daily activities.
• Permanent feeling of breast heaviness.
• Emotional impact: low self-esteem, anxiety or difficulty finding comfortable clothing.

Self-observation can guide, but never replaces a specialised medical assessment.

The exact causes of gigantomastia cannot always be precisely determined. In most cases, a combination of hormonal, genetic factors and an exaggerated response of the breast tissue to certain stimuli are involved. The main triggers are:

• Hormonal imbalances. Changes in oestrogen and prolactin levels during puberty or pregnancy can trigger the growth of glandular tissue.
• Genetic predisposition. There is a hereditary component: increased sensitivity of breast tissue to hormones that is transmitted in certain families.
• Medications. Some drugs such as certain immunosuppressants, anticonvulsants, D-penicillamine or hormone therapies can induce a hypertrophic response of the breast.
• Idiopathic cause. In some cases, no obvious trigger is identified, not even in hormonal or genetic studies.

Depending on the time of onset and the cause, gigantomastia is classified into:

• Juvenile (or virginal) gigantomastia: occurs during puberty, with rapid and disproportionate growth during the development stage.
• Gestational (or gravid) gigantomastia: occurs during pregnancy due to increased prolactin and oestrogens. In many cases, it subsides after childbirth, although it may reappear in subsequent pregnancies.
• Drug-induced (iatrogenic) gigantomastia: triggered as a side effect of certain medications.
• Idiopathic gigantomastia: when no specific cause is identified.

The definitive treatment for gigantomastia is surgical. There are no medical treatments that significantly and permanently reduce breast volume, although in mild or transient cases (for example, some related to medication) a prior hormonal or pharmacological adjustment may be considered.

Breast reduction mammoplasty

The breast reduction mammoplasty (or breast reduction) is the treatment of choice. It involves removing excess glandular tissue, fat and skin, and reshaping the breast to restore a shape, size and weight proportionate to the body.

In cases of gigantomastia, this surgery has a more complex approach than a conventional reduction: a large amount of tissue is removed and, often, specific techniques are needed to preserve the vascularisation and sensitivity of the nipple. For this reason, in many cases, gigantomastia surgery is considered reconstructive, not merely aesthetic.

The objectives of the procedure are:

• Relieve back, neck and shoulder pain by reducing breast weight.
• Correct posture and improve spinal alignment.
• Facilitate physical activity and daily tasks.
• Improve the proportion and aesthetics of the breast, with natural and symmetrical results.

The procedure is performed under general anaesthesia and its duration depends on the degree of hypertrophy. The postoperative period requires the use of a medical bra, relative rest for the first few weeks and follow-up checks. Scars improve progressively over time.

Breast reduction is also one of the surgeries with the highest satisfaction rate among patients, thanks to the immediate relief of symptoms and the improvement in quality of life.