Symptoms, risk, screening and diagnostic confirmation

Detect Melanoma is about choosing the right test for the right risk.

A melanoma detection guide covering changing moles, ABCDE, ugly duckling lesions, dermoscopy, excision biopsy, pathology and why apps/AI should not replace examination.

Screening reality Symptoms not to ignore Immunotherapy Vaccines

Educational, not personal medical advice. A new or changing pigmented lesion, bleeding mole, ugly-duckling lesion or rapidly growing pink nodule should be examined.

ABCDE

asymmetry, border, color, diameter and evolution.

Change

evolution is often the most important sign.

Biopsy

excision biopsy is preferred when possible.

No app

should replace clinical examination.

Brief outline

What melanoma means.

Melanoma is a potentially lethal skin cancer, but many are curable if removed early. Detection depends on noticing change and confirming with biopsy.

Clinical melanoma lesion — A changing lesion is often the key warning.

Detection frame

Screening is for people without symptoms. Diagnosis is for symptoms, abnormal examination, family history, imaging findings or abnormal labs. The same test can be sensible in one setting and misleading in another.

Do not ignore

Symptoms and signs not to ignore.

Changing moleGrowth, shape or color change matters.

Ugly ducklingA lesion that looks unlike the patient's other moles.

Bleeding or crustingEspecially without trauma.

Nodular melanomaCan be raised, firm, growing and pink or dark.

Acral lesionsPalms, soles and nails can be missed.

Amelanotic melanomaMay be pink and not obviously pigmented.

Risk and genetics

Demographics, risks and genetics.

UV exposureSunburns and tanning beds increase risk.

Many/atypical molesRaises melanoma risk.

Fair skinLower melanin protection increases risk.

Family historyCDKN2A and other familial syndromes exist.

Immune suppressionTransplant and immune suppression raise risk.

Prior melanomaRequires ongoing surveillance.

Screening

Who should actually be screened?

Population skin screening recommendations vary. High-risk people often benefit from regular clinician skin checks and total-body photography/dermoscopy.

Self-check

ABCDE and ugly duckling

Useful prompts, not diagnostic proof.

Clinical

Dermoscopy

Improves pattern recognition in trained hands.

Tissue

Excision biopsy

Preferred when melanoma is suspected and feasible.

Pathology

Breslow thickness/ulceration

Defines risk and next steps.

Selected

Sentinel node biopsy

Staging test for appropriate invasive melanomas; it samples the first draining node and can avoid full node clearance when negative, reducing lymphoedema/lymphedema risk.

Caution

Phone apps/AI

May help triage but can falsely reassure.

Images, labs and tissue

Useful tests and what they can miss.

Detection usually needs a chain: suspicion, imaging or lab triage, tissue or cytology when needed, then pathology and molecular testing where it changes management.

Skin cancer excision — Suspicious lesions are removed or sampled for pathology.

Skin excision closure — Excision biopsy and margins matter.

Pros, cons and controversy

Benefits, harms and the false-positive problem.

Skin checks can save lives, but low-risk mass screening and consumer apps can generate false positives and false reassurance. Sentinel-node biopsy is not screening; in selected melanoma it stages spread while helping avoid unnecessary full node clearance and lymphoedema/lymphedema. A changing lesion wins over a reassuring photograph.

Melanoma detection trials immunotherapyformelanoma.com vaccineformelanoma.com DetectCancer.org hub

Sources and trials

Good starting points.

NCI melanomaMelanoma overview and diagnosis. USPSTF skin cancer screeningEvidence statement for asymptomatic screening. ClinicalTrials.gov melanoma detectionDermoscopy, imaging and biomarker trials.