Breast Care A-Z · Symptom · BREASTLUMP

Breast lump

also: lump in the breast, breast mass, breast nodule

A breast lump is any new mass or area of thickening in the breast; most turn out to be benign, but every persistent lump deserves proper assessment. You may have found something you hadn't noticed before, or a routine check raised a question — and the anxious wait to be seen is the part that is easiest to shorten.

Quick answers

What does a breast lump feel like?

Breast lumps vary in how they feel — some are hard, some soft, some mobile, some fixed. A cancer-related lump is often, but not always, hard, irregular, and fixed to the surrounding tissue; a cyst is often smooth and moves easily. These are generalisations and not a reliable way to tell benign from malignant — that requires imaging and, where indicated, a biopsy.

What doctor should I see for a breast lump?

Start with your GP, who will examine you and arrange referral to a breast clinic if needed. In the NHS, referral is usually on a two-week urgent pathway. You can also book directly with a private breast surgeon or a private breast clinic.

What happens next after I find a lump?

Your GP will refer you to a breast clinic, where most lumps are assessed at a one-stop appointment that combines examination, imaging (ultrasound, sometimes with a mammogram), and a biopsy if needed — typically within 60 to 90 minutes. Imaging results are usually available on the day; biopsy results take a few working days.

The breast lump — Breastory Encyclopedia of Breast Health · Plate XXXII Dark luminous encyclopedia plate for clinical patient consultation: the breast lump — assessment, common causes, triple assessment pathway, lump variants and outcomes. Deep purple atmosphere with magenta and cyan glow accents, glassmorphic data panels, and full citations. PLATE XXXII · ONCOLOGY · DIAGNOSIS VOL. I · MMXXVI the breast lump the breast lump understanding a new lump · assessment, investigation and next steps benign or malignant · triple assessment · when to seek help FIG 01 THE BREAST LUMP IN CONTEXT A · BREAST · CORONAL CROSS-SECTION pectoralis major iv Nipple retraction or discharge can indicate involvement iii Skin surface dimpling or tethering may signal involvement i Palpable lump discrete, new, persistent upper outer zone [1] ii Glandular tissue fibroglandular stroma where most lumps arise v Chest wall fixation here is ominous T4 disease B · TISSUE LAYERS · SECTION Skin Subcutaneous fat Fibroglandular tissue Discrete mass · region of clinical interest · Retromammary fat Pectoralis major — layers vary by individual constitution and age-related glandular involution C · TRIPLE ASSESSMENT · OVERVIEW triple assessment triple assessment Clinical examination Imaging USS / mammogram Biopsy core needle Each element scored 1 (benign), 3 (uncertain), or 5 (malignant) · results combined for MDT [4] All 1s → benign, observe Any 3 → repeat / wider excision Any 5 → malignant, treat accordingly Combined sensitivity ~99% [4] when all three elements are used together — the right management always comes from a conversation with your specialist team FIG 02 IDENTIFICATION & PROFILE The clinical picture The clinical picture SIGNS & SYMPTOMS Location Upper outer quadrant most common [1] Character Discrete, palpable, persistent mass Texture Smooth / hard, gritty if suspicious Borders Well-defined vs ill-defined / spiculate Mobility Mobile vs fixed or tethered Skin Dimpling, tethering, peau d'orange Nipple Retraction or discharge Tenderness Not a reliable indicator of aetiology Cycle link Benign lumps may vary monthly Duration Persistent lumps always need review — any new lump warrants clinical assessment, regardless of age or perceived risk Common causes Common causes BENIGN & MALIGNANT Fibroadenoma Most common, under-35s [2] Fibrocystic change Cyclical, bilateral, nodular Simple cyst Fluid-filled, smooth, any age Fat necrosis Post-traumatic, can mimic cancer Breast abscess Tender, erythematous, periareolar Phyllodes tumour Rapidly growing, rare, can recur DCIS Non-invasive, often screen-detected Invasive ductal Most common cancer type [3] Invasive lobular Diffuse thickening, harder to feel Lymphoma / rare Always exclude with biopsy if uncertain — malignancy accounts for ~10% of referred lumps via the two-week wait pathway [1] FIG 03 COMPARISON · FIBROADENOMA vs BREAST CARCINOMA Fibroadenoma Fibroadenoma TYPICALLY BENIGN Carcinoma Carcinoma MALIGNANT ATTRIBUTE Typical age 15–35 [2] 50+ most common [3] Texture Smooth, rubbery Hard, gritty Borders Well-defined Irregular, spiculate Mobility Highly mobile Fixed, tethered Skin changes Usually none Dimpling, tethering Nipple Normal Retraction or discharge Growth rate Slow / stable Variable, often progressive Imaging Oval, hypoechoic [4] Spiculate, irregular [4] Management Observe or excise Biopsy and treat — clinical features alone cannot confirm aetiology; biopsy is definitive FIG 04 INVESTIGATION PIPELINE · STEP BY STEP 01 Self-detection patient notices a new lump 02 GP assessment history and examination 03 2WW 2WW referral NICE NG12 urgent 14-day target [1] 04 C I B Triple assess. clinic + imaging + core biopsy 05 MDT review radiology, path, surgery together 06 Management plan surveillance, surgery, or systemic therapy Triple assessment reduces missed cancers to fewer than 1 in 100 [4] · the pathway is designed to be fast and thorough — most patients are reassured at the first clinic visit — suitability of each management option is a conversation with your specialist team FIG 05 ATLAS · LUMP VARIANTS Fibroadenoma smooth, mobile under-35s [2] benign Simple cyst fluid-filled, smooth any age benign Fat necrosis post-traumatic can mimic cancer benign Breast abscess tender, red periareolar benign / infective Phyllodes rapidly growing rare, any age borderline / malignant Carcinoma hard, irregular spiculate malignant FIG 06 OUTCOMES & KEY FIGURES I REFERRED LUMPS BENIGN [1] ~9 in 10 ~9 in 10 of lumps referred via the two-week pathway are not cancer rapid reassurance in most cases II TRIPLE ASSESS. SENSITIVITY [4] ~99% ~99% sensitivity when all three elements used together clinical + imaging + biopsy combined III 5-YEAR SURVIVAL ALL STAGES [3] ~81% ~81% for breast cancer UK, all stages combined rises sharply with earlier detection IV 2WW PATHWAY SEEN ≤14 DAYS [2] 93% 93% NHSE target: 93% of patients seen within 14 days urgent referral is a patient right FIG 07 SOURCES & FURTHER READING 1 NICE NG12 (2023). Suspected cancer: recognition and referral. NICE guideline NG12. Updated 2023. 2 NHS England (2023). Cancer waiting times — annual report 2022–23. NHSE Cancer Programme. 3 Cancer Research UK (2024). Breast cancer survival statistics. cancerresearchuk.org. Accessed May 2026. 4 Dixon JM et al. (2000). Triple assessment in breast disease. BMJ Clin Evid. Also: Gui GPH et al. (2010) Eur J Surg Oncol 36:S3–8. 5 Breast tumour classification. WHO Classification of Tumours: Breast (5th edn, 2022). IARC Press, Lyon. Clinically authored by Dr Fiona Tsang-Wright , FRCS (Gen Surg) GMC 4549831 · ORCID 0000-0003-4801-026X
Visual Reference · Breast lump
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Definition
A breast lump is any area of thickening or distinct swelling that feels different from the surrounding breast tissue, and it can be a normal finding, a benign (non-cancerous) condition, or occasionally a sign of breast cancer.

Common questions The questions patients ask first

What does a breast lump feel like?
Breast lumps vary in how they feel — some are hard, some soft, some mobile, some fixed. A cancer-related lump is often, but not always, hard, irregular, and fixed to the surrounding tissue; a cyst is often smooth and moves easily. These are generalisations and not a reliable way to tell benign from malignant — that requires imaging and, where indicated, a biopsy.
What doctor should I see for a breast lump?
Start with your GP, who will examine you and arrange referral to a breast clinic if needed. In the NHS, referral is usually on a two-week urgent pathway1. You can also book directly with a private breast surgeon or a private breast clinic2.
What happens next after I find a lump?
Your GP will refer you to a breast clinic, where most lumps are assessed at a one-stop appointment that combines examination, imaging (ultrasound, sometimes with a mammogram), and a biopsy if needed — typically within 60 to 90 minutes2. Imaging results are usually available on the day; biopsy results take a few working days.
I found a hard lump — should I worry?
A hard lump should be examined, but hardness alone does not mean it is cancer. Cysts can feel hard, and some cancers feel soft. The right next step is to see a GP or breast clinic, not to try to tell from the feel of it.

A breast lump is any area of thickening or distinct swelling that feels different from the surrounding breast tissue, and it can be a normal finding, a benign (non-cancerous) condition, or occasionally a sign of breast cancer.

Most breast lumps that people notice are not cancer — common causes include cysts, fibroadenomas, and normal hormonal changes in the breast tissue3. But because some lumps are cancerous, every new breast lump should be examined by a doctor1. The only way to know what a lump is, is to have it properly assessed.

Orientation Why you might be reading about this

You have probably found something in your breast that you did not notice before, or a routine check has raised a question. Most lumps turn out to be benign, but the wait between finding a lump and being seen is often the most anxious part — and that is also the part that is easiest to shorten. This page explains what a breast lump is, what it can be, and what a sensible next step looks like.

Related terms: Fibroadenoma · Breast cyst · DCIS · Invasive ductal carcinoma · Triple assessment · One-stop breast clinic

Definition What a breast lump can be

The breast is made up of lobules (the glands that produce milk), ducts (the channels that carry it), fatty tissue, and fibrous tissue. A lump can arise from any of these. The most common causes in adults are:

  • Cysts — fluid-filled sacs, usually smooth and mobile, often tender and more noticeable around the menstrual cycle. Most cysts do not need treatment; if they are painful, they can be drained with a fine needle.
  • Fibroadenomas — smooth, firm, rubbery lumps of glandular tissue, most common in women in their twenties and thirties. They are benign and usually left alone unless they grow or cause discomfort.
  • Normal nodularity — in many people, breast tissue is naturally lumpy, and this can feel more pronounced at certain points in the menstrual cycle.
  • Fat necrosis — a benign area of damaged fatty tissue, sometimes after an injury or surgery, which can feel firm and be mistaken for a tumour.
  • Breast cancer — which can feel like a hard, irregular lump that does not move easily under the skin, but can also feel subtle, soft, or rounded. No lump should be assumed to be cancer on examination alone, and no lump should be assumed to be benign on examination alone.

Diagnosis How a breast lump is assessed

The standard assessment in the UK is called triple assessment and usually takes place at a one-stop breast clinic2. It has three components, done in the same visit where possible:

  1. Clinical examination by a breast specialist.
  2. Imaging — ultrasound for most patients under 35, and ultrasound plus mammogram for most aged 35 and over2.
  3. Biopsy — a small tissue sample taken under local anaesthetic, if imaging or examination warrants it2.

Imaging results are usually available on the day. Biopsy results typically take a few working days because the tissue has to be processed and examined under a microscope.

Why imaging matters What the lump feels like is not enough

Online information often describes cancerous lumps as hard, painless, and fixed, and benign lumps as soft, mobile, and tender. These descriptions are a rough generalisation and not a reliable guide. Some cancers are soft and mobile; some cysts are hard. The only way to know what a lump is, is to have it imaged and, where indicated, biopsied.

Next steps What to do next

Any new breast lump should be seen by a clinician — start with your GP. In the UK, a GP who is concerned about a breast lump will refer you on the urgent suspected cancer referral, with diagnosis or rule-out aimed within the NHS 28-day Faster Diagnosis Standard to an NHS breast clinic1, or you can arrange a private appointment directly. Either route gives you access to the same triple assessment. GPs typically make an urgent suspected cancer referral for an unexplained breast lump in anyone aged 30 or over; under 30, a non-urgent referral is often appropriate, though urgent referral can still be made if features are concerning. GPs typically make an urgent suspected cancer referral for an unexplained breast lump in anyone aged 30 or over; under 30, a non-urgent referral is often appropriate, though urgent referral can still be made if features are concerning.

You should seek advice sooner rather than later if, alongside a lump, you notice any of the following:

  • A change in the shape, size, or outline of the breast.
  • Changes to the skin — dimpling, puckering, or redness.
  • Changes to the nipple — inversion, discharge (especially bloody), or a rash.
  • A lump in the armpit.

A new lump in a man, in pregnancy, or in someone with a family history of breast or ovarian cancer should also be assessed promptly.

Read more about the one-stop breast clinic pathway.


Resources Further reading

Sources & guidance

Every figure on this page is anchored to a published source. Tap a number in the text or below to jump to the reference.

  1. guideline National Institute for Health and Care Excellence (NICE). Suspected cancer: recognition and referral (NG12). London: NICE. 2015 ;Last updated 2023; section 1.6 Breast cancer https://www.nice.org.uk/guidance/ng12 Cited for: UK two-week-wait referral pathway; an unexplained breast lump in patients aged 30+ is a referral indication.
  2. guidance Royal College of Surgeons / Association of Breast Surgery. Best Practice Diagnostic Guidelines for Patients Presenting with Breast Symptoms. London: ABS. 2010 https://associationofbreastsurgery.org.uk/professionals/information-hub/guidelines/2010/best-practice-diagnostic-guidelines-for-patients-presenting-with-breast-cancer-symptoms Cited for: UK pathway for assessment of breast lumps via triple assessment in a one-stop clinic; differential diagnosis (cyst, fibroadenoma, fat necrosis, cancer).
  3. cohort Barton MB, Elmore JG, Fletcher SW. Breast symptoms among women enrolled in a health maintenance organization: frequency, evaluation, and outcome. Annals of Internal Medicine. 1999 ;130(8):651–657 doi:10.7326/0003-4819-130-8-199904200-00005 Cited for: Population frequency of presenting breast symptoms; majority of breast lumps in symptomatic women are benign.
  4. patient NHS. Breast lump. nhs.uk. 2024 https://www.nhs.uk/symptoms/breast-lump/ Cited for: Patient-facing orientation for breast lumps; not used for clinical claims.