Clinical Presentations of Breast Disease

Slide 1 · Clinical Presentations

of Breast Disease

Clinical patterns • Anatomical basis • Differential diagnosis

A clinicopathologic teaching lecture

Dr Abu Suraih Sakhri

MBBS, MD (Pathology)

www.abusuraihsakhri.com

Slide 2 · Learning objectives

Relate common breast symptoms to normal anatomy and benign changes.

Differentiate diffuse nodularity, pain, discrete masses, discharge and inflammation.

Explain why clinical assessment, imaging and tissue sampling are complementary.

Identify presentations requiring evaluation for malignancy.

Slide 3 · The breast contains distinct epithelial and stromal compartments

Ducts and lobules form the epithelial glandular system.

Luminal and myoepithelial cells constitute two epithelial layers.

Interlobular and intralobular stromal cells can also produce lesions.

Ducts and lobules

Luminal epithelium

Myoepithelium

Stroma

Slide 4 · Major ducts branch into terminal duct–lobular units

The ductal–lobular system comprises approximately 5–15 segments or lobes.

Each major duct branches toward small terminal ducts.

Terminal ducts connect to lobules containing clusters of acini.

Schematic: Branching duct–lobular system

Nipple

Major duct

Terminal ducts and acini

Slide 5 · The terminal duct–lobular unit is a functional unit

A terminal duct and its lobule together form the TDLU.

Lobular architecture changes with reproductive hormonal signals.

Normal structural variation helps explain diffuse clinical nodularity.

Terminal duct

Lobule / acini

Terminal duct–lobular unit

Slide 6 · An intact duct has layered epithelial boundaries

Luminal epithelial cells face the ductal lumen.

Myoepithelial cells form the outer epithelial layer.

Basement membrane separates the ductal system from the stroma.

Cross-section of a duct (schematic)

Basement membrane

Myoepithelial layer

Luminal epithelium

Slide 7 · Stromal origin differs from epithelial origin

Both epithelial proliferation and stromal proliferation can yield masses.

A palpable mass does not reveal the originating cell type.

Fibroadenoma is one common benign mass highlighted in this chapter.

Epithelial compartment

Stromal compartment

Ductal and lobular epithelium

Can give rise to proliferative lesions

Interlobular and intralobular stroma

Can give rise to masses

Slide 8 · Breast tissue responds dynamically to reproductive hormones

Estrogen, progesterone and prolactin influence branching and lobular maturation.

Changes occur during puberty, menstrual cycles, pregnancy and lactation.

Symptoms should be interpreted in their physiologic context.

Hormonal influence

Ductal / lobular change

Clinical texture or symptoms

Slide 9 · Menstrual cycling alters lobular structure

Lobules are relatively quiescent early in the cycle.

After ovulation, epithelial proliferation and secretory activity increase.

Falling hormone levels at menstruation produce partial regression.

Follicular

Relatively quiescent lobules

Post-ovulatory

Secretory activity and proliferation

Menstruation

Hormone levels fall

Regression

Partial lobular regression

Slide 10 · Pregnancy produces marked lobular expansion

Lobules increase in number and size during pregnancy.

Near term, lobules occupy most of the breast with relatively scant stroma.

Postpartum secretion changes from colostrum to milk.

Pregnancy

Lobular maturation

Near term

Marked lobular expansion

Postpartum

Colostrum → milk

Slide 11 · Involution changes tissue composition and imaging appearance

Lobules begin involuting after the third decade.

Radiodense fibrous interlobular stroma is progressively replaced by fat.

Endogenous and exogenous hormone exposure can modify these changes.

Earlier pattern

Involuted pattern

Relatively more fibrous stroma

Greater radiodensity

Relatively more adipose stroma

Greater radiolucency

Slide 12 · Breast tissue may extend beyond the obvious breast contour

Ductal and lobular tissue may extend into the chest wall subcutis.

The axillary tail can reach into the axillary fossa.

Breast lesions may therefore arise outside grossly evident breast tissue.

Ductal–lobular extension

Axillary / chest wall tissue

Lesion outside obvious breast contour

Slide 13 · Milk-line remnants represent persistent developmental tissue

Supernumerary nipples or breast tissue arise from persistent embryonic epidermal thickenings.

The milk line extends from axilla toward perineum.

Such sites may present with premenstrual painful swelling.

Persistence along the embryonic milk line

Axilla

Thoracic region

Abdominal region

Perineum

Illustrative sites, not a patient examination

Slide 14 · Accessory axillary breast tissue has clinical implications

Axillary glandular tissue may represent a normal anatomic extension.

A palpable axillary abnormality need not arise from a lymph node.

Residual accessory breast tissue helps explain why prophylactic mastectomy does not completely eliminate cancer risk.

Axillary glandular tissue

Possible breast-derived lesion

Requires anatomical recognition

Slide 15 · Congenital and acquired nipple inversion differ

Congenital inversion reflects failure of nipple eversion in development.

Congenital inversion may be unilateral and is usually of little clinical significance.

New nipple retraction is more concerning for invasive cancer or inflammatory nipple disease.

Congenital

Acquired

Longstanding

Frequently benign

May evert in pregnancy or on traction

New retraction

Consider invasive carcinoma or nipple inflammation

Slide 16 · Timing is central to interpreting nipple inversion

A longstanding inverted nipple may be developmental.

Change from a previously everted nipple is a different clinical finding.

Acquired retraction deserves assessment for an underlying disease process.

Prior nipple appearance

Determine whether change is new

Interpret acquired retraction as potentially pathologic

Slide 17 · Five symptom groups bring breast disease to attention

Diffuse lumpiness and mastalgia are common complaints.

A discrete mass and nipple discharge require symptom characterization.

Erythema and edema signal an inflammatory presentation.

Diffuse lumpiness

Pain

Palpable mass

Nipple discharge

Erythema / edema

Slide 18 · Most symptomatic breast lesions are benign

The chapter reports more than 90% of symptomatic breast lesions are benign.

The diagnostic purpose of assessment is often to exclude malignancy.

Symptom prevalence does not make any individual suspicious presentation safe to ignore.

Population pattern

Individual decision

Most symptomatic lesions are benign

Concerning findings still require evaluation

Slide 19 · Breast cancers present clinically or through screening

Some carcinomas produce symptoms or a palpable lesion.

Others come to attention through mammographic screening.

Clinical symptoms and screening identify partly different groups of lesions.

Symptomatic route

Screening route

Clinical sign or symptom triggers assessment

Mammographic finding precedes symptoms

Slide 20 · Mammography emphasizes densities and calcifications

Densities are one principal mammographic sign of carcinoma.

Calcifications are another principal mammographic sign.

Imaging contributes information not available from palpation alone.

Density

Calcifications

Structural radiographic finding

Mineral-density radiographic finding

Slide 21 · Diffuse lumpiness often reflects nonmalignant tissue

Lumpiness means generalized nodularity rather than a single clearly defined mass.

It commonly reflects normal glandular tissue or fibrocystic changes.

The key diagnostic question is whether a discrete lesion is hidden within the nodularity.

Conceptual distribution, not imaging

Diffuse nodularity

Discrete focal mass

Slide 22 · Normal glandular architecture contributes to nodularity

The lobular system and stroma vary with life stage and hormones.

Normal glandular tissue may be palpated as an irregular background texture.

Background nodularity should not automatically be labelled a tumor.

Normal glandular tissue

Variable diffuse texture

Perceived “lumpiness”

Slide 23 · Imaging can clarify prominent diffuse nodularity

Pronounced nodularity may obscure a discrete mass clinically.

Imaging is used to investigate whether a focal lesion is present.

The symptom description and imaging question should remain distinct.

Prominent nodularity

Possible occult discrete mass

Imaging assessment

Slide 24 · A diffuse nodular breast differs from a discrete mass

Diffuse nodularity describes widespread texture.

A discrete mass has a definable focal boundary on examination.

Different clinical patterns generate different diagnostic questions.

Diffuse nodularity

Discrete mass

Widespread texture

Often normal tissue or fibrocystic change

Localized lesion

Benign or malignant causes

Slide 25 · Mastalgia may be cyclic or noncyclic

Mastalgia and mastodynia refer to breast pain.

Cyclic pain tracks menstrual timing.

Noncyclic pain is more often localized to a particular region.

Cyclic

Noncyclic

Relationship with menses

Often diffuse

Not tied to the cycle

Often focal

Slide 26 · Diffuse cyclic pain can arise from premenstrual edema

Premenstrual tissue changes may increase breast discomfort.

The timing and diffuse character support a cyclic mechanism.

Cyclic pain does not, by itself, imply a discrete lesion.

Premenstrual change

Tissue edema

Diffuse cyclic mastalgia

Slide 27 · Noncyclic mastalgia is often localized

Noncyclic pain frequently affects one breast region.

It may reflect a particular local process.

A specific lesion is nevertheless often not identified.

Localized noncyclic pain

Search for local cause

Lesion may remain unidentified

Slide 28 · Recognized causes of noncyclic pain vary

A ruptured cyst may produce localized pain.

Physical injury can produce focal symptoms.

Infection is another possible inflammatory cause.

Ruptured cyst

Physical injury

Infection

No lesion identified

Slide 29 · Pain is usually benign but does not exclude cancer

Most painful masses are benign.

Approximately 5% of painful masses to breast cancer.

Interpret pain with any accompanying focal mass, discharge or skin change.

Pain alone is not a reliable discriminator

Benign disease is common

Cancer remains possible

Assess accompanying findings

Slide 30 · Pain pattern helps structure the differential

Feature

Cyclic mastalgia

Noncyclic mastalgia

Timing

Menstrual relationship

No necessary cycle relationship

Distribution

Often diffuse

Usually localized

Possible explanation

Premenstrual edema

Cyst rupture, injury, infection

Lesion found?

Not necessarily

Often no specific lesion

Slide 31 · A palpable mass may originate from epithelium or stroma

Stromal-cell proliferation may create a palpable mass.

Epithelial-cell proliferation may also create a mass.

Palpation alone cannot establish histologic lineage.

Stromal or epithelial proliferation

Breast mass

Diagnosis requires further characterization

Slide 32 · Palpability generally implies a lesion of measurable size

Usual detection of palpable masses around 2–3 cm.

Size at palpation is not equivalent to biological onset.

Small radiologic abnormalities may be nonpalpable.

Palpable

Nonpalpable

Often approximately 2–3 cm

Clinical recognition

May be found by mammography

Screening recognition

Slide 33 · Benign masses often have circumscribed clinical features

Common benign masses are often round or oval.

They may be rubbery and mobile.

These clinical features suggest benignity but cannot prove it.

Round / oval

Rubbery

Mobile

Often benign

Slide 34 · Invasive carcinomas may feel hard, irregular and fixed

Malignant tumors invade across tissue planes.

Invasion can produce an irregular contour and restricted mobility.

Desmoplastic hardening may produce a scirrhous character.

Infiltrative growth across tissue planes

Irregular lesion + altered stromal response

Hard / relatively immobile mass

Slide 35 · Tissue-plane invasion explains reduced mass mobility

A circumscribed lesion can move relative to surrounding tissue.

Invasive growth connects a lesion with adjacent tissue planes.

Fixity is therefore a mechanistic clinical clue rather than a diagnosis.

More mobile

Relatively fixed

Well-demarcated lesion

Less tethering of tissues

Tissue-plane invasion

Greater tethering

Slide 36 · Fibroadenomas and cysts are frequent benign masses

The chapter identifies fibroadenomas among the common benign palpable masses.

Cysts are another common benign cause.

Neither should be diagnosed definitively from palpation alone.

Fibroadenoma

Cyst

Frequent benign solid mass

Frequent benign cystic mass

Slide 37 · Cancer probability among palpable masses rises with age

Age modifies the prior probability of malignancy in a palpable mass.

Approximately 10% under age 40 and 60% over age 50 in its cited context.

These chapter estimates must not be treated as universal contemporary risk calculators.

Younger than 40

Older than 50

Chapter estimate: 10%

Lower malignant proportion

Chapter estimate: 60%

Higher malignant proportion

Slide 38 · Breast carcinomas are not uniformly distributed by site

Approximately half are described in the upper outer quadrant.

The chapter places about one fifth centrally or subareolarly.

The remaining three quadrants account for about one tenth each.

Approximate site distribution reported

20%

50%

Upper outer

10%

10%

10%

Central / subareolar: 20%

Slide 39 · Screening by palpation has important limitations

Only a subset of cancers are first recognized as palpable masses.

Cancers capable of metastasis may disseminate before becoming palpable.

Robbins therefore notes limited mortality benefit from screening by palpation.

Tumor becomes biologically aggressive

Metastatic potential may precede palpability

Palpation screening has limited mortality effect

Slide 40 · Palpable mass features are suggestive, not definitive

Clinical attribute

Often benign

Concerning for invasion

Contour

Round / oval

Irregular

Consistency

Rubbery

Hard / scirrhous

Mobility

Mobile

Relatively fixed

Biologic interpretation

May be circumscribed

May invade tissue planes

Slide 41 · Nipple discharge is characterized by pattern

Volume and laterality help distinguish physiologic from pathologic patterns.

Spontaneous versus expressed discharge is clinically relevant.

Milky, serous and bloody appearances have different common associations.

Four clinical descriptors

Quantity

Small vs substantial

Laterality

Bilateral vs unilateral

Provocation

Expressed vs spontaneous

Appearance

Milky, serous, bloody

Slide 42 · Small-volume bilateral discharge may be physiologic

Robbins recognizes a small quantity of bilateral discharge as potentially normal.

Unilateral, spontaneous or bloody discharge is a distinct clinical pattern.

Description should precede etiologic interpretation.

Potentially physiologic

Concerning pattern

Small volume

Bilateral

Spontaneous

Unilateral

Bloody

Slide 43 · Galactorrhea refers to inappropriate milk secretion

Milky nipple discharge is termed galactorrhea.

Elevated prolactin can be associated with this symptom.

Galactorrhea is not described as a feature of breast malignancy.

Increased prolactin or related stimulus

Milk secretion

Galactorrhea

Slide 44 · Endocrine disorders can be associated with galactorrhea

Pituitary adenoma may produce elevated prolactin.

Hypothyroidism may be associated with galactorrhea.

Endocrine anovulatory syndromes are another association.

Pituitary adenoma

Hypothyroidism

Anovulatory syndromes

Elevated prolactin

Slide 45 · Several medications may be linked to galactorrhea

The chapter lists oral contraceptives and tricyclic antidepressants.

Methyldopa and phenothiazines are also listed.

Drug history is therefore part of interpreting milky discharge.

Oral contraceptives

Tricyclic antidepressants

Methyldopa

Phenothiazines

Slide 46 · Repeated stimulation may induce milk secretion

Repeated nipple stimulation can induce lactation.

A milky appearance alone does not establish a pituitary lesion.

Physiologic and exposure context matters when interpreting galactorrhea.

Repeated nipple stimulation

Lactation may be induced

Milky nipple discharge

Slide 47 · Serous or bloody discharge frequently has benign causes

Large duct papillomas commonly produce bloody or serous discharge.

Cysts are another common association.

Discharge appearance still requires contextual interpretation.

Large duct papilloma

Cyst

Common cause of serous / bloody discharge

Another common benign association

Slide 48 · Pregnancy can produce a bloody nipple discharge

Pregnancy causes rapid growth and remodeling of breast structures.

This remodeling may produce bloody discharge.

The clinical context modifies the differential diagnosis.

Pregnancy-associated growth

Rapid glandular remodeling

Possible bloody discharge

Slide 49 · Spontaneous unilateral bloody discharge is concerning

The combination is particularly important in older patients.

It may be associated with an underlying malignancy.

Clinical assessment should not rely on color alone without laterality and spontaneity.

Concerning discharge pattern

Spontaneous

Unilateral

Bloody (especially with older age)

Slide 50 · Ductal carcinoma in situ can present with discharge

When discharge is associated with malignancy, DCIS is highlighted as a common cause.

Clinical discharge does not distinguish DCIS from all benign duct lesions.

Pathologic evaluation may be needed to establish the underlying ductal lesion.

Underlying ductal lesion

Nipple discharge

Distinguish benign duct lesion from DCIS

Slide 51 · Age changes the significance of nipple discharge

Carcinoma in 7% of females with discharge under 60 years.

The corresponding figure is 30% at age 60 or older.

These are source-specific estimates, not an individual diagnostic probability.

Younger than 60

Age 60 or older

7% carcinoma-associated discharge

(textbook report)

30% carcinoma-associated discharge

(textbook report)

Slide 52 · Discharge pattern narrows the clinical differential

Pattern

Common associations in Robbins

Interpretive significance

Small, bilateral

May be normal

Potentially physiologic

Milky

Prolactin, endocrine or drug causes

Galactorrhea

Serous / bloody

Papilloma, cyst

Benign causes common

Spontaneous unilateral bloody

May reflect DCIS / carcinoma

Greater concern with age

Slide 53 · Inflammation produces erythema and edema

Inflammatory change may involve all or part of a breast.

Erythema and edema are the principal visible clinical effects described.

Infection is the most common context highlighted by Robbins.

Erythema

Edema

Visible redness

Inflammatory change

Tissue swelling

Inflammatory change

Slide 54 · Breast infections occur most often around lactation

Breast infection is uncommon outside lactation and breastfeeding.

The immediate breastfeeding period is a vulnerable interval.

A lactation history provides etiologic context for a red and painful breast.

Lactation / breastfeeding

Greater opportunity for infection

Inflamed painful breast

Slide 55 · Lactational mastitis follows breaches in the nipple surface

Cracks and fissures of the nipple may permit organism entry.

Bacteria then invade breast tissue and cause local infection.

Clinical features include erythema, pain and often fever.

Nipple fissure or crack

Bacterial entry

Painful erythematous breast ± fever

Slide 56 · Staphylococcal and streptococcal infections differ

Staphylococcus aureus is a common organism in acute mastitis.

Staphylococcal infection often causes single or multiple abscesses.

Streptococci are associated with spreading cellulitis.

S. Aureus

Abscess formation

Streptococci

Spreading cellulitis

Slide 57 · Inflammatory breast signs have noninfectious mimics

Autoimmune and foreign-body–type reactions can inflame breast tissue.

Extravasated keratin or secretions may elicit inflammation.

Clinical erythema does not prove bacterial infection.

Infection

Autoimmune process

Extravasated keratin

Extravasated secretion

Slide 58 · Inflammatory breast cancer can mimic mastitis

Inflammatory carcinoma may present with a red, swollen breast.

The clinical appearance can resemble an infectious process.

Keeping inflammatory carcinoma in the differential.

Infectious inflammation

Inflammatory carcinoma

Pain / erythema

Often associated with lactation

Can mimic erythema and swelling

Requires exclusion

Slide 59 · Clinical assessment, imaging and biopsy are complementary

Clinical evaluation defines the presenting problem.

Imaging identifies structural findings and targets.

Sampling provides cellular or tissue evidence when indicated.

Complementary assessment domains

Clinical

Presentation and

Physical findings

Imaging

Densities and

Calcifications

Sampling

Core biopsy

And/or FNA

Slide 60 · Tissue sampling may be cytologic or histologic

Robbins mentions core needle biopsy as a tissue-sampling option.

Fine-needle aspiration cytology provides a cytologic approach.

The chosen diagnostic method must be interpreted with clinical and imaging findings.

Core biopsy

FNA cytology

Tissue fragments

Histologic architecture

Aspirated cells

Cytologic assessment

Slide 61 · Combined assessment supports accurate case resolution

The chapter reports detection of more than 99.5% of malignancies in symptomatic patients by combined assessment.

That figure applies to the combined approach, not one standalone test.

Discordant clinical, radiologic and pathologic findings require reconciliation.

Clinical examination + imaging

Core biopsy and/or FNA as indicated

Integrated diagnosis

Slide 62 · Different symptoms suggest different diagnostic questions

Presentation

First mechanistic question

Important exclusion

Diffuse nodularity

Normal / fibrocystic tissue?

Concealed discrete mass

Pain

Cyclic, injury, cyst or infection?

Painful carcinoma

Discrete mass

Benign versus invasive features?

Malignancy

Nipple discharge

Pattern, endocrine or duct lesion?

DCIS / carcinoma

Red, edematous breast

Lactational infection or mimic?

Inflammatory carcinoma

Slide 63 · Case: Generalized nodularity before menses

A patient reports bilateral diffuse breast lumpiness that becomes more noticeable in the premenstrual period. No distinct focal lump is identified on the initial assessment.

Interpretation and diagnostic reasoning

Physiologic glandular change and fibrocystic change are possible explanations.

Pronounced nodularity can justify imaging to exclude a discrete lesion.

Diffuse texture and a circumscribed mass are different observations.

Slide 64 · Case: A new firm, poorly mobile mass

An older patient presents with a new irregular hard breast mass that appears less mobile than the surrounding tissue.

Interpretation and diagnostic reasoning

Irregular hardness and reduced mobility fit the invasive pattern described.

Age modifies the probability that a palpable mass is malignant.

Clinical impression needs imaging and appropriate sampling.

Slide 65 · Case: Spontaneous unilateral bloody discharge

A patient aged over 60 reports spontaneous bloody discharge from one nipple, without reported endocrine symptoms.

Interpretation and diagnostic reasoning

The combination of age, spontaneity, laterality and blood is concerning.

Benign duct papilloma remains a possible cause.

DCIS and other carcinoma must be considered and evaluated.

Slide 66 · Case: Erythematous painful breast during lactation

A breastfeeding patient develops breast pain, redness and fever after nipple fissuring.

Interpretation and diagnostic reasoning

This presentation fits the mechanism of acute lactational mastitis.

S. Aureus may lead to abscess; Streptococci may cause cellulitis.

An atypical or unresolved inflammatory presentation requires broader differential consideration.

Slide 67 · Clinical interpretation depends on symptom combinations

Diffuse nodularity, cyclic pain and a mobile oval mass often have benign explanations.

A new hard fixed mass, acquired retraction or suspicious discharge changes concern.

An erythematous breast can be infectious or malignant in appearance.

Common benign contexts

Concerning contexts

Diffuse nodularity

Cyclic pain

Small bilateral discharge

Hard fixed mass

New nipple retraction

Unilateral bloody discharge

Slide 68 · Clinical presentations of breast disease: Synthesis

Anatomy and hormones explain many benign breast symptoms.

Symptom pattern determines whether diffuse, focal, ductal or inflammatory disease is suspected.

Malignancy is excluded through integrated assessment, not symptom labels alone.

Clinical and imaging findings are complemented by core biopsy or cytology when indicated.

Slide 69 · Selected reference

Robbins, Cotran & Kumar: Pathologic Basis of Disease

11th edition (2026) • Chapter 23: The Breast

Primary teaching scope: breast anatomy, developmental variants and

clinical presentations (printed pp. 944–946).

Clinical anatomy, developmental variants, symptom patterns,

and integrated diagnostic assessment.