Nipple Discharge
Nipple discharge is the release of fluid from one or both nipples, which may be physiologic or pathologic, with spontaneous, unilateral, bloody, or single-duct discharge warranting evaluation for underlying conditions such as intraductal papilloma or malignancy.
Murtagh Diagnostic Strategy
| Category | Diagnosis | Key Discriminator | Cantonese Question / Finding | Probability |
|---|---|---|---|---|
| Probability Diagnosis | Physiological / fibrocystic changes | Bilateral, multiple ducts, non-bloody, cyclical | 「兩邊都有？嚟M之前會唔會多啲？」 | ~30% |
| Ductal ectasia | Yellow-green-black multicoloured discharge, bilateral/multiple ducts, ± nipple retraction, smoker [3] | 「啲嘢係咪黃綠色或者深色？個乳頭有冇縮咗入去？」 | ~20% | |
| Intraductal papilloma | Bloody or serous discharge, unilateral, single duct, no palpable mass; MC cause of bloody nipple discharge [3][4] | 「啲嘢係咪帶血、由一個窿出嚟、淨係一邊？」 | ~10% | |
| Serious Not To Miss | CA breast / DCIS | Bloody discharge + mass, skin dimpling, peau d'orange, LN, progressive enlargement [1][5] | 「有冇摸到硬嘢？皮膚有冇凹咗或者橙皮噉？腋下有冇腫塊？」 | ~5% |
| Pituitary prolactinoma | Bilateral milky discharge + amenorrhoea + headache/visual field defect [6] | 「兩邊都有白色奶狀嘅嘢流出嚟？有冇停經、頭痛、或者睇嘢有冇盲咗一邊？」 | ~2% | |
| Paget's disease of the nipple | Eczematous/scaly/ulcerated nipple lesion, unilateral, ± bloody discharge [4] | 「乳頭有冇出疹、甩皮、或者損咗？」 | < 1% | |
| Pitfalls | Breast abscess / mastitis | Purulent/foul-smelling, tender, erythema, fever, lactating | 「有冇紅腫、痛、發燒？餵緊人奶？」 | ~5% |
| Cyst communicating with duct | Palpable fluctuant mass + discharge | 「有冇摸到一嚿軟軟腍腍嘅嘢？」 | ~2% | |
| Masquerades | Drug-induced galactorrhoea | Bilateral milky discharge, on antipsychotics/antiemetics/methyldopa/H2 blockers [6] | 「你有冇食緊精神科藥、止嘔藥、或者胃藥？」 | ~10% |
| Hypothyroidism (↑TRH → ↑prolactin) | Fatigue, weight gain, cold intolerance, constipation | 「有冇覺得特別攰、肥咗、怕凍？」 | ~2% | |
| Trying to Tell Me Something? | Cancer phobia / anxiety | FHx, recent media, fear of cancer, avoidance of intimacy | 「你最擔心係唔係癌症？屋企有冇人試過？」 | ~25% |
| Relationship / body image concern | Embarrassment, partner pressure, avoidance | 「呢個情況有冇影響到你同伴侶嘅關係？」 | ~5% |
| Time | Task | Cantonese Key Phrases | Why It Scores Marks |
|---|---|---|---|
| 0:00–0:30 | Greeting, introduction, rapport | 「你好，我係X醫生，今日由我同你傾吓，方唔方便講吓你嘅情況？」 | Friendly opening, permission-seeking → interpersonal marks |
| 0:30–1:30 | Chief complaint & HPI – onset, duration, laterality, colour, spontaneous vs expressed, single/multiple duct, associated lump/pain | 「你幾時開始留意到有嘢流出嚟？係一邊定兩邊？咩顏色㗎？係自己流出嚟定係你揸先至有？」 | Core symptom analysis; bloody/unilateral/single-duct = pathological [1][2] |
| 1:30–2:30 | Red flags & targeted Hx – blood in discharge, breast lump, skin changes, nipple retraction, weight loss, bone pain; pregnancy/lactation; medications (antipsychotics, OCP, HRT); menstrual Hx; FHx breast/ovarian CA | 「有冇見到啲嘢帶血？有冇摸到硬嘢？個乳頭有冇凹咗入去？有冇食緊任何藥物？屋企人有冇試過生乳癌？」 | Rules out CA breast, Paget's, prolactinoma, drug-induced galactorrhoea [1][3] |
| 2:30–3:30 | ICE – Ideas, Concerns, Expectations | 「你自己覺得呢個情況可能係咩原因？你最擔心嘅係啲咩？你今日嚟最想我幫你啲咩？」 | ICE is explicitly marked on the Case Report Form |
| 3:30–4:30 | PMHx, social Hx, psychosocial – previous breast disease, breast RT, estrogen exposure (menarche, menopause, parity, breastfeeding, COC/HRT), occupation, smoking, stress/anxiety, relationship, functional impact | 「你幾歲開始嚟M？停咗M未？有冇食過避孕丸或者荷爾蒙藥？你而家做咩工作？呢件事對你日常生活有冇影響？」 | Biopsychosocial problems; breast CA risk factors [1][4] |
| 4:30–5:15 | Summarise, signpost management plan | 「等我同你總結吓…你主要係見到（右邊）乳頭有啲（帶血嘅）分泌物，出咗大概X個禮拜。我建議幫你做個檢查同安排照超聲波/乳房X光，盡快搵清楚原因。」 | Summarising shows structure; demonstrates safe management intent |
| 5:15–6:00 | Safety net, empathy, close | 「我理解你一定好擔心，但大部分乳頭分泌物係良性嘅，我哋會幫你跟進清楚。如果分泌物突然增多或者帶血，記住要即刻返嚟睇。你仲有冇嘢想問？」 | Empathy + safety-netting + closing → high interpersonal marks |
Uncovering the hidden agenda: The patient may present saying "nipple discharge" but actually fear breast cancer after a relative's diagnosis, or be embarrassed about the symptom affecting intimacy. Always ask: 「你今日點解決定嚟睇醫生？」 and 「有冇啲嘢令你特別擔心？」
| Domain | English Question | Cantonese Question | Why It Matters | If Positive Think Of |
|---|---|---|---|---|
| Onset/Duration | When did you first notice the discharge? | 「幾時開始發現有嘢流出嚟？」 | Acute vs chronic changes DDx | Recent onset → papilloma, CA; chronic → duct ectasia |
| Laterality | One side or both? | 「一邊定兩邊？」 | Unilateral = pathological; bilateral = usually benign [1][2] | Unilateral → papilloma, CA; Bilateral → physiological, galactorrhoea |
| Number of ducts | From one opening or several? | 「係由一個窿定係幾個窿出嚟？」 | Single duct = pathological; multiple ducts = usually benign [1][2] | Single → papilloma, DCIS; Multiple → duct ectasia, physiological |
| Colour | What colour is it? | 「咩顏色㗎？透明、白色、黃綠色、定係帶血？」 | Bloody → papilloma/CA; milky → galactorrhoea; yellow-green → duct ectasia/infection [1][3] | Bloody → intraductal papilloma (MC cause), DCIS, invasive CA |
| Spontaneous vs expressed | Does it come out by itself or only when you squeeze? | 「係自己流出嚟定係你揸先至有？」 | Spontaneous = more concerning | Spontaneous + bloody + unilateral → must exclude CA |
| Breast lump | Have you felt any lump? | 「有冇摸到任何硬嘢或者腫塊？」 | Persistent mass + nipple discharge MUST undergo further evaluation to r/o CA [3] | CA breast, fibroadenoma, cyst |
| Skin/nipple changes | Any skin dimpling, redness, rash on nipple, or nipple pulling inward? | 「個皮膚有冇凹咗、紅咗、出疹、定係乳頭縮咗入去？」 | Peau d'orange → inflammatory CA [5]; eczematous nipple → Paget's [4] | Paget's disease, inflammatory CA, duct ectasia (retraction) |
| Constitutional | Any weight loss, bone pain, SOB? | 「有冇瘦咗、骨痛、或者氣促？」 | Metastatic breast CA red flags [1] | Advanced CA breast |
| Pregnancy/Lactation | Are you pregnant or breastfeeding? When did you last breastfeed? | 「你有冇懷孕或者餵緊人奶？上次餵人奶係幾時？」 | Lactational discharge can persist ≥6 months after cessation [3] | Physiological galactorrhoea, lactational mastitis |
| Medications | Are you taking any medications – psychiatric drugs, stomach pills, hormones, contraceptives? | 「有冇食緊任何藥？例如精神科藥、胃藥、避孕丸或者荷爾蒙藥？」 | Drug-induced hyperprolactinaemia (antipsychotics, antiemetics, methyldopa, H2 blockers) [6] | Drug-induced galactorrhoea |
| Menstrual Hx | How are your periods? Regular? Any missed periods? Age of first period/menopause? | 「你嘅月經正唔正常？有冇停咗經？幾歲嚟第一次M？」 | Amenorrhoea + galactorrhoea → prolactinoma; estrogen exposure → CA risk [6] | Prolactinoma, PCOS, pregnancy |
| FHx | Anyone in family with breast, ovarian, prostate, or pancreatic cancer? | 「屋企人有冇人試過生乳癌、卵巢癌或者其他癌症？」 | BRCA-related malignancy risk [1] | Hereditary breast CA |
| Smoking | Do you smoke? | 「你有冇食煙？」 | Smoking → risk factor for duct ectasia and periductal mastitis [3] | Ductal ectasia, periductal mastitis |
| Psychosocial / Functional | How has this affected your daily life, work, or relationships? | 「呢件事對你嘅生活、工作、或者同伴侶嘅關係有冇影響？」 | Biopsychosocial problem; anxiety about cancer | Anxiety, body image issues, relationship strain |
| Health-seeking behaviour | Why did you decide to come today? Have you seen anyone else about this? | 「點解你今日決定嚟睇？之前有冇睇過其他醫生？」 | Uncover hidden agenda / trigger event | Health anxiety triggered by media/family event |
Case Report Form Answer Builder
- CC: Nipple discharge × [duration], [laterality], [colour], [spontaneous/expressed]
- HPI key points: Onset, progression, single vs multiple duct, colour (bloody/serous/milky/green), spontaneous vs on expression, associated breast lump, nipple/skin changes, constitutional symptoms
- Background: LMP, pregnancy/lactation status, medications, FHx breast/ovarian CA, smoking, estrogen exposure history
- Write in chronological order; describe discharge characteristics precisely
- Most likely: "To find out the cause of the nipple discharge" or "Worried about breast cancer"
- Could also be: "Triggered by a family member's recent breast cancer diagnosis" / "Embarrassed and affecting relationship"
- Phrase as a single sentence capturing the patient's primary motivation
| Likely Content | Example Wording | |
|---|---|---|
| Ideas | "I think it might be an infection" / "I'm worried it could be cancer" | Patient thinks the discharge may be due to infection or cancer |
| Concerns | Fear of breast cancer, worry about needing surgery, embarrassment | Patient is concerned this could be breast cancer, especially given FHx |
| Expectations | Wants investigation / referral / reassurance | Patient expects to be referred for imaging or specialist assessment to rule out cancer |
- Intraductal papilloma – if bloody/serous, unilateral, single duct, no palpable mass, perimenopausal woman [3][4]
- Ductal ectasia – if multicoloured (yellow-green-black), multiple ducts, ± nipple retraction, older/smoker [3]
- Galactorrhoea (drug-induced or prolactinoma) – if bilateral milky discharge + medications or amenorrhoea [6]
- Choose based on the stem clues: colour, laterality, duct number, age, and medication history
GC 181 high yield [1]: Nipple discharge assessment must characterise: unilateral/bilateral, blood-stained/milky/serous, spontaneous/on expression, single duct/multiple duct, any palpable breast mass/axillary lymph node. These are the sign descriptors that differentiate benign from malignant.
| DDx | Key Discriminator |
|---|---|
| Breast carcinoma / DCIS | Bloody discharge + palpable mass + skin changes + unilateral; progressive breast lump enlargement is sinister [5] |
| Ductal ectasia | Multicoloured (yellow-green-black) discharge, multiple ducts, nipple retraction, smoker [3] |
| Galactorrhoea (hyperprolactinaemia) | Bilateral milky discharge, drug history (antipsychotics), amenorrhoea, no mass [6] |
(If stem suggests papilloma as most likely, shift CA breast to first DDx position)
| Domain | Problem |
|---|---|
| Biological | Nipple discharge requiring investigation to exclude breast malignancy |
| Psychological | Anxiety / fear of breast cancer; possible depression or health anxiety |
| Social | Embarrassment affecting intimate relationships; functional impact on daily activities (staining clothes, avoiding social situations); possible work absenteeism for investigations |
| Diagnosis/DDx | Best Supporting Physical Sign | How to Elicit It | Why It Supports This Diagnosis |
|---|---|---|---|
| Intraductal papilloma | Expressible bloody/serous discharge from a single duct on periareolar compression | Gently compress periareolar region quadrant-by-quadrant; identify which single duct produces discharge | Single-duct bloody discharge without palpable mass is classic for papilloma [1][3] |
| Breast CA / DCIS | Palpable hard irregular breast mass ± axillary lymphadenopathy | Systematic palpation of all four quadrants + axillary tail + axillary LN groups (anterior, posterior, medial, lateral, apical) [1] | Hard, irregular, fixed mass with LN → strongly suggests malignancy |
| Ductal ectasia | Nipple retraction (fibrosis) with expressible multicoloured discharge from multiple ducts | Inspect nipple for retraction; compress periareolar region | Subareolar fibrosis causing retraction + characteristic discharge colour [3] |
| Paget's disease | Eczematous/scaly/ulcerated unilateral nipple-areolar lesion | Visual inspection of nipple surface | Unilateral eczema-like nipple change that doesn't respond to topical steroids = Paget's until proven otherwise [4] |
| Galactorrhoea | Bilateral expressible milky discharge from multiple ducts; no palpable mass | Compress both breasts; note milky discharge bilaterally | Bilateral milky + no mass → hyperprolactinaemia; check for visual field defect (bitemporal hemianopia) if prolactinoma suspected [6] |
| Mastitis / abscess | Tender, erythematous, warm, ± fluctuant breast swelling | Inspection and palpation for warmth, tenderness, fluctuance | Inflammatory signs + purulent discharge = infection [3] |
Must-Not-Miss Red Flags – Urgent Referral
- Bloody unilateral single-duct discharge → must exclude CA / DCIS → triple assessment (clinical + radiological + pathological) [1][2]
- Palpable mass + nipple discharge → must exclude malignancy regardless of discharge colour [3]
- Eczematous nipple lesion (unilateral, doesn't heal) → Paget's disease of nipple → biopsy [4]
- Progressive breast lump enlargement is considered sinister and suggestive of malignancy [5]
- Peau d'orange → associated with inflammatory breast cancer [5]
- Bilateral milky discharge + amenorrhoea + visual field defect → pituitary macroadenoma → urgent MRI
Top Traps That Lose Marks:
- Forgetting to characterise the discharge – You MUST document: laterality, colour, single vs multiple duct, spontaneous vs expressed. These are directly from GC lecture slides [1][2].
- Calling all nipple discharge "galactorrhoea" – Galactorrhoea specifically means milky white discharge. Bloody ≠ galactorrhoea.
- Missing drug history – Antipsychotics, antiemetics, methyldopa, H2-blockers, OCP/HRT can all cause galactorrhoea [6].
- Not asking about pregnancy/breastfeeding – The most common cause of milky discharge; always exclude first.
- Forgetting ICE – Many students take a thorough history but forget to ask ICE. It is a separately marked item.
- Not exploring the hidden agenda – Patient may be embarrassed, fear cancer, or have relationship concerns.
- Writing "breast cancer" as the most likely diagnosis when the discharge is bilateral, milky, and from multiple ducts – this is much more likely physiological or drug-related.
Shortest Safe Management / Safety-Net Line: 「我會幫你安排照超聲波同/或乳房X光，如果需要嘅話會轉介你去專科做進一步檢查。如果喺等嘅期間，分泌物突然增多、帶血、或者摸到新嘅硬塊，記住即刻返嚟。」
High Yield Summary
What to ASK: Laterality, colour (bloody/milky/green), single vs multiple duct, spontaneous vs expressed, associated lump, nipple/skin changes, medications (antipsychotics, antiemetics, OCP), pregnancy/lactation, FHx breast/ovarian CA, menstrual history, ICE.
What to WRITE: Precise discharge characterisation in CC. Most likely Dx = intraductal papilloma (bloody, single duct, unilateral) or ductal ectasia (multicoloured, multiple ducts) or galactorrhoea (milky, bilateral) depending on stem. DDx must include CA breast. Biopsychosocial must include cancer anxiety and social/relationship impact.
What NOT to MISS: Bloody unilateral single-duct discharge → triple assessment to exclude CA. Palpable mass + discharge → must investigate. Eczematous nipple → Paget's. Drug-induced galactorrhoea. Always ask ICE and hidden agenda.
Active Recall - Family Medicine Clinical Test
[1] Lecture slides: GC 181. Breast mass breast cancer; benign breast diseases; mammography; breast cancer screening.pdf (slides on nipple discharge and clinical history) [2] Lecture slides: Breast Examination_A Kwong_updated 1_9_2023_short upload version.pdf (slides on nipple discharge characterisation) [3] Senior notes: Ryan Ho Fundamentals.pdf (Section 3.5.9 Nipple Discharge); Ryan Ho Urogenital.pdf (Section 9.2.2 Nipple Discharge); Maksim Surgery Notes.pdf (Section 8.2, 8.5) [4] Senior notes: Ryan Ho Urogenital.pdf (Section 9.5.3 Paget's Disease of the Nipple, Section 9.2.2) [5] Past papers: 2025 Fourth Summative MCQ.pdf (Q21 Peau d'orange, Q23 sinister breast symptoms) [6] Senior notes: Ryan Ho Endocrine.pdf (Section 5.2.2 Hyperprolactinaemia); MBBS Final MB (Surgery) (Felix PY Lai).pdf (nipple discharge DDx and management)
Neck Lump
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