Most people arrive at this article because of something specific: a lump noticed by chance, a change seen in the mirror, or a finding on routine mammography. The interval between noticing breast cancer symptoms and knowing what it is can be the most difficult part of the whole process, and it is usually the part with the least information available. The first thought is nearly always cancer. That thought sends some people to a doctor within the week and keeps others away for months — the fear works in both directions, and the delay it causes is the more dangerous of the two.[1]
None of them, on its own, means cancer — cysts, hormonal changes and infections account for many breast changes. Sorting one from the other takes a clinical examination, breast imaging and, when indicated, a biopsy. Each gives different information, and the findings have to be read together.[4]
1. Breast Cancer Symptoms: Which Breast Changes Need Medical Assessment?
Have the following assessed:[2]
- A new lump or thickening in the breast or underarm.
- A change in breast size or shape, particularly when it affects one breast.
- Skin dimpling or puckering, or thickened skin resembling an orange peel.
- A newly inverted nipple — one that has recently started turning inward.
- Nipple discharge, particularly spontaneous discharge from one breast that is bloody or clear.
- Persistent scaling, crusting or an eczema-like change around one nipple.
- Unexplained redness, swelling or persistent pain in one area.
Breast cancer lumps are often painless, but pain does not exclude cancer. Nor can a lump be reliably classified as cancerous or non-cancerous by how it feels — hard, soft or movable.
A lump is also often attributed to a knock or a bump. An injury can cause bruising or a firm area that settles over a few weeks, but a lump that persists needs assessment regardless of what preceded it. A remembered injury is not an explanation until the lump has resolved.
When should you seek care?
Arrange an appointment promptly for a new lump or an unexplained breast or nipple change. Do not wait for the next routine screening mammogram.
A breast that becomes rapidly red, swollen or painful needs urgent assessment, especially alongside fever or feeling unwell. Infection is one possible cause. Changes that persist or worsen need reassessment, because some cancers can resemble inflammation.
These principles apply during pregnancy and breastfeeding, and to men who develop breast or nipple changes.
2. What happens at the first consultation?
You can start with your usual doctor, a surgeon experienced in breast conditions, or a breast clinic.
The doctor will ask when you first noticed the change, whether it is progressing, and whether it varies with your menstrual cycle. Pregnancy or breastfeeding, previous breast problems, medicines and hormone use are all relevant.
Mention any family history of breast, ovarian, pancreatic or prostate cancer, including the relative’s age at diagnosis. The absence of a family history does not rule out breast cancer.
The examination usually covers both breasts, the nipples and the nearby lymph node areas, particularly the underarms.
Many women put off this appointment because of the examination itself — the exposure, or the prospect of being examined by a male doctor. You can ask for a female doctor. Do not put off the examination.
Bring previous mammograms and ultrasound images along with their reports. Comparing old and new images helps establish whether a finding is new or has changed.
3. Why are examination, imaging and biopsy considered together?
Assessment of a suspicious breast change is often called triple assessment:
- Clinical assessment: Your history and the doctor’s examination.
- Imaging: Usually mammography, ultrasound or both.
- Tissue assessment: A biopsy when the findings require it.[3]
Not every breast lump needs a biopsy. Lumps that raise the suspicion of cancer are biopsied.[6] But examination and imaging do not always agree. Mammography or ultrasound may show nothing where the examining doctor can feel a lump, because some cancers are hard to see on these scans. An MRI may be ordered to get a clearer picture.
4. Understanding breast imaging
Diagnostic mammography
A mammogram is an X-ray examination of the breast. A screening mammogram checks people without symptoms. A diagnostic mammogram investigates a symptom or an abnormal screening result, and may include additional views.
The breast is briefly compressed between two plates to obtain clear images. Mammography can identify lumps, changes in tissue structure, and calcifications — small calcium deposits. Many calcifications are harmless; particular patterns require further investigation.
Breast ultrasound
Ultrasound uses sound waves to examine breast tissue. It helps distinguish a cyst, a fluid-filled structure, from a solid lump, and can assess underarm lymph nodes.
It is commonly the first test for a lump in younger women and during pregnancy. Depending on the findings, mammography may also be needed. Ultrasound and mammography give complementary information; one does not always replace the other.
Breast MRI
Magnetic resonance imaging (MRI) uses magnetic fields and radio waves to produce detailed images. It is useful in selected situations, but is not routinely necessary for every lump. Additional findings on MRI may themselves require investigation.
5. What does the BI-RADS number mean?
Your imaging report may include a BI-RADS category — a standard way of describing the findings and the recommended next step.
| Category | Meaning and usual next step |
|---|---|
| 0 | The assessment is incomplete. Additional images or comparison with previous studies is needed. |
| 1 | No abnormality is identified on imaging. |
| 2 | A benign, or non-cancerous, finding is identified. |
| 3 | The finding is probably benign. Follow-up imaging, often initially at six months, is recommended. |
| 4 | The finding is suspicious. A biopsy is usually recommended. |
| 5 | The finding is highly suggestive of cancer. A biopsy is needed to confirm it. |
| 6 | Cancer has already been confirmed by biopsy. |
BI-RADS is not a cancer stage. Category 4 does not mean stage 4, and an imaging category alone does not establish the diagnosis. Recommendations must also account for symptoms and examination findings.[5]
6. When is a biopsy needed?
A biopsy removes cells or tissue for examination by a pathologist — a doctor who diagnoses disease by studying these samples.
A biopsy is recommended when examination or imaging raises sufficient concern, or when the cause of a finding remains uncertain.
Core needle biopsy is commonly preferred for a suspicious breast lump. After the area is numbed with local anaesthetic, the doctor uses a hollow needle to remove small tissue samples. Ultrasound or another imaging method often guides the needle.
Fine-needle aspiration, sometimes called FNAC, uses a thinner needle to collect cells or fluid. It is useful in selected situations, but may give less information than a core biopsy.
A vacuum-assisted biopsy collects tissue using a needle with suction. A surgical biopsy, which removes tissue through an operation, is reserved for situations where needle sampling is unsuitable or does not resolve the diagnosis.
What should you expect?
Core biopsy is usually an outpatient procedure. Expect pressure during sampling, and some bruising or soreness afterwards. Tell the team about blood-thinning medicines; do not stop them without instructions.
A small marker may be placed at the biopsy site to help locate it on future imaging or during treatment. Ask for wound-care instructions and when to expect the results.
The risk of a correctly performed biopsy causing cancer to spread is extremely low. Avoiding a necessary biopsy can delay diagnosis and treatment.
7. Understanding the biopsy result
The result may show:
- A benign condition: No cancer is found. Follow-up depends on the diagnosis and on whether it explains the examination and imaging findings.
- Atypical or uncertain changes: The cells are abnormal, or the sample is insufficient for a definite conclusion. Further sampling or surgical removal may be recommended.
- DCIS: Abnormal cells are confined within the breast ducts.
- Invasive cancer: Cancer has grown into surrounding breast tissue. This finding alone does not establish distant spread.
A benign result needs further review if it does not adequately explain a suspicious scan or examination. A repeat biopsy in that situation helps resolve the discrepancy.
If cancer is found, additional tests on the tissue usually assess ER, PR and HER2 — features that help select treatment. These results may arrive separately from the initial diagnosis.
Before you leave with your result
- What exactly does the report say — benign, atypical, DCIS, or invasive cancer?
- Does that result explain the change that brought you in? If not, ask what happens next.
- Are any tests still pending? ER, PR and HER2 often come separately.
- Who do I contact if I have not heard by a given date, and what is that date?
- Who is coordinating my next appointment, and when is it?
- Take the reports with you. Keep the images and the written reports together.
References
- World Health Organization. Global Breast Cancer Initiative Implementation Framework. Geneva: WHO, 2023.
- National Institute for Health and Care Excellence (NICE). Suspected Cancer: Recognition and Referral (NG12), UK. Last updated 2026.
- Indian Council of Medical Research (ICMR). Consensus Document for the Management of Breast Cancer. New Delhi: ICMR.
- Somashekhar SP, Deo SVS, Sarkar D, et al. “Association of Breast Surgeons of India (ABSI) Practical Consensus Statement, Recommendations, and Guidelines for the Treatment of Breast Cancer in India 2021 — Indian Solutions for Indian Problems.” Indian Journal of Surgery, 2021.
- American College of Radiology. BI-RADS (Breast Imaging Reporting and Data System) Manual, v2025.
- Karim MO, et al. “Triple Assessment of Breast Lump: Should We Perform Core Biopsy for Every Patient?” Cureus, 2020;12(3):e7479.
Next article: Breast Cancer — From Diagnosis to Treatment.