Fibroid Cysts vs Breast Cancer: What You Should Know

Finding a lump during a self-exam can be unsettling, and it is completely natural to have questions about what it might mean.

The reassuring reality is that many lumps are harmless and simply reflect normal changes in your body, particularly those linked to your menstrual cycle. However, not all lumps are the same.

Understanding the different types of breast lumps can help you know what to look out for, when to seek advice, and feel more confident about your health going forward.

What are fibroid cysts in the breast?

A breast cyst is a non-cancerous lump or fluid-filled sac in the breast. It is sometimes informally called a “fibroid cyst", though this is not a standard medical term. Breast cysts are commonly linked to fibrocystic breast changes, a condition influenced by hormonal changes in your menstrual cycle.

You might notice:

• General breast tenderness or soreness

• Breast lumps or nodules you can feel

• Clear or slightly coloured nipple discharge

Although these symptoms can be uncomfortable, they are usually harmless and simply part of your body’s normal menstrual cycle.

What is breast cancer?

Breast cancer occurs when cells in the breast begin to grow uncontrollably, most commonly in the milk ducts (ductal carcinoma) or the milk-producing glands (lobular carcinoma).

Common symptoms include:

• A persistent lump that does not change with your menstrual cycle

• Unusual nipple discharge

• Skin changes such as dimpling or puckering

• Nipple inversion or a change in nipple position 

Early detection is key. Regular breast screenings and consulting a doctor promptly if anything unusual appears can significantly improve outcomes. With timely diagnosis and the right treatment, many people with breast cancer can manage the condition effectively and lead healthy lives.

Breast cysts vs breast cancer: What are the key differences?

Here’s a clear breakdown of their key physical characteristics:

These are common patterns, not absolute rules. However, you cannot diagnose yourself—any persistent lump needs medical evaluation. 

If you notice a breast lump or are concerned about changes in your breasts, it is advisable to seek medical advice. You may schedule an appointment with Thomson Medical to discuss your observations and receive professional guidance on the next steps.

Types of benign breast lumps

The most common are:

• Fibroadenomas:

  • Firm, smooth, and movable lumps

  • These are most common in younger women

• Fibrocystic breast disease:

  • Fluid-filled sacs (cysts) or thickened, rubbery tissue

  • Can range from simple cysts to more complex ones

• Fat necrosis:

  • Firm, round lumps that may feel tender

  • Often develops after a breast injury or surgery

• Intraductal papillomas:

  • Small growths inside the milk ducts

  • May cause nipple discharge

• Lipoma:

  • A soft lump made of fatty tissue

  • Usually painless and slow-growing

• Duct ectasia:

  • Occurs when milk ducts become widened and blocked

  • More common in women aged 35 to 55

  • May cause nipple discharge or discomfort

• Phyllodes tumours:

  • Rare lumps that grow in the breast’s connective tissue (supporting tissue)

  • Can grow quickly and should be checked by a doctor

Although these lumps are non-cancerous, some require monitoring or treatment depending on their size, growth, and how they affect surrounding tissue.

If you have risk factors for breast issues or are concerned about your breast health, it is advisable to seek medical advice. You may arrange a consultation with Thomson Medical to discuss your situation and available guidance. 

How are breast lumps diagnosed?

Your doctor will use imaging and sometimes tissue sampling to determine what type of lump you have.

The main diagnostic tools are:

Mammogram

A mammogram is an X-ray of your breast that can detect lumps and abnormalities.

Breast cysts often appear as smooth, round areas, but a mammogram cannot always tell if a lump is fluid-filled or solid. An ultrasound is usually needed for confirmation.

Cancerous lumps may look irregular or star-shaped and can sometimes show tiny calcium spots called 'microcalcifications'.

Ultrasound

An ultrasound uses sound waves to create images of the breast and is often used to check a lump more closely.

It is especially helpful for telling whether a lump is fluid-filled (a cyst) or solid. Cysts usually appear smooth, round, and dark on ultrasound, while solid lumps may look irregular with less defined edges.

Because it shows the inside structure of a lump more clearly, ultrasound is often used together with a mammogram to help doctors make a more accurate diagnosis.

Biopsy

If imaging suggests a lump could be cancerous, a breast biopsy is done to remove a small sample of tissue for testing. This is the only way to confirm whether cancer is present.

Results will show whether the lump is non-cancerous or cancerous. If cancer is found, the biopsy also identifies the type of cancer, which helps doctors decide on the most appropriate treatment.

What are the treatment options for breast cysts and fibroadenomas?

Most breast lumps are treated in a gentle way. Treatment is only considered if there are changes, helping you feel reassured and comfortable throughout the process.

Breast cyst

Many breast cysts do not require treatment. 

If a cyst is uncomfortable or large, options include:

• Take pain relief to ease discomfort

• Wear a well-fitting brato help improve daily comfort

• Reduce caffeine or maintain a gentle, healthy routine to help ease symptoms

• Taking medication or supplements, such as evening primrose oil, if recommended by your doctor, although results can vary

For cysts that persist or recur, minor procedures may be considered:

• Fine needle aspiration, which safely removes fluid from the cyst

• Surgical removal, which reserved for cysts that do not resolve or keep returning

Fibroadenomas

Fibroadenomas are usually non-cancerous and often do not require treatment. Small, stable lumps can simply be monitored over time.

However, treatment may be recommended if the fibroadenoma:

• Grows quickly

• Becomes large or causes discomfort

• Shows uncertain features on imaging (to rule out other conditions)

In these cases, surgical removal may be considered to relieve symptoms or confirm the diagnosis.

Most people can continue their usual daily activities, but it’s important to stay aware of any changes, such as a lump increasing in size, new symptoms, or persistent discomfort, and see a doctor if these occur.

What are the treatment options for breast cancer?

Your breast cancer treatment depends on several factors, including the cancer stage, type, BRCA gene, and your individual circumstances. 

Surgery

Surgery is often used to remove the tumour and reduce the risk of cancer spreading. 

Other treatments (before or after surgery)

You may also need additional treatments, either before or after surgery, to improve outcomes.

• Before surgery (neo-adjuvant therapy):

  • Treatments such as chemotherapy or hormone therapy may be used to shrink the tumour

  • These can make surgery easier or allow for breast-conserving options.

• After surgery (adjuvant therapy):

  • Further treatment may be recommended to reduce the risk of the cancer returning.

These treatments can include:

• Chemotherapy:

  • Used to target any remaining cancer cells and prevent them from growing or dividing. It may be recommended at various stages of breast cancer.

• Radiation therapy:

  • Often used to reduce the risk of recurrence in your breast, chest, or nearby lymph nodes after surgery.

• Hormone therapy:

  • For cancers that are hormone-sensitive, this treatment helps control cancer growth.

• Targeted therapy:

  • Focuses on specific features of the cancer, such as certain genes or proteins, to improve treatment effectiveness. 

  • It is sometimes used together with chemotherapy.

Throughout treatment, your care team will discuss your options and help you understand what may be appropriate for your condition.

If you’re considering breast cancer treatment, request an appointment with Thomson Medical. Our team can explain surgery, neo-adjuvant and adjuvant therapies, and help you make informed decisions tailored to your situation.

FAQ

Can a breast cyst turn into breast cancer?

In most cases, breast cysts are benign and do not become cancerous. However, it is always worth having any new or changing lump assessed by your doctor.

Are breast fibrocystic cysts dangerous?

Breast cysts are generally benign and not dangerous. They often fluctuate with the menstrual cycle and may resolve on their own. Your doctor may confirm this with a clinical assessment.

Can you have both breast cysts and breast cancer at the same time?

It is possible for a person to have both benign cysts and breast cancer, but they are separate conditions with different characteristics. Having cysts does not increase the risk of developing cancer.

Do breast cysts in the breast go away on their own?

Breast cysts may decrease in size or resolve naturally over time, particularly after menopause.

What does a cancerous lump feel like compared to a cyst?

Cancerous lumps are often described as hard, irregular, or fixed to surrounding tissue. Benign cysts are usually smoother, rounder, and more mobile under the skin.

Can breast cysts cause breast pain?

Breast cysts can sometimes cause discomfort, which may relate to natural hormonal changes during the menstrual cycle.

The information provided is intended for general guidance only and should not be considered medical advice. For personalised recommendations and tailored advice based on your unique situations, please consult a specialist at Thomson Medical. Request an appointment with Thomson Medical today.