Ddetect skin cancerDetectCancer.org

Symptoms, risk, screening and diagnostic confirmation

Detect Skin Cancer is about choosing the right test for the right risk.

A skin cancer detection guide covering basal cell carcinoma, squamous cell carcinoma, melanoma, actinic keratoses, non-healing sores, dermoscopy and biopsy.

Screening realitySymptoms not to ignoreImmunotherapy
Educational, not personal medical advice. A non-healing sore, bleeding scaly patch, rapidly growing tender lump, changing mole or lesion on sun-damaged skin deserves examination.
Visible

many skin cancers can be seen early.

Biopsy

confirms subtype.

SCC

can spread, especially high-risk sites.

BCC

rarely spreads but can destroy local tissue.

Brief outline

What skin cancer means.

Skin cancer includes basal cell carcinoma, squamous cell carcinoma, melanoma and rarer tumors. Most are visible, which makes early detection possible.

Open skin cancer excision
Non-healing or suspicious lesions need biopsy or excision.

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.

Non-healing soreEspecially one that bleeds or crusts repeatedly.
Pearly bumpCommon basal cell pattern.
Scaly tender patchCan be SCC or actinic keratosis.
Rapid growthKeratoacanthoma/SCC patterns may grow fast.
Lip/ear/scalp lesionsHigh-risk sites need care.
Changing moleThink melanoma.

Risk and genetics

Demographics, risks and genetics.

UV exposureSun exposure and tanning beds dominate risk.
AgeRisk rises with cumulative exposure.
Immune suppressionTransplant patients have high SCC risk.
Fair skinBurn-prone skin increases risk.
Prior skin cancerStrong predictor of another.
HPV/scars/radiationCan matter in selected SCC cases.

Screening

Who should actually be screened?

Routine population screening varies by country. High-risk people often need regular skin surveillance.

Clinical

Full skin examination

Checks visible and hard-to-see areas.

Tool

Dermoscopy

Improves accuracy for trained clinicians.

Tissue

Shave, punch or excision biopsy

Choice depends on suspected cancer and site.

Pathology

Margins and risk features

Depth, perineural invasion and differentiation guide care.

Selected

Nodal ultrasound, imaging or sentinel node biopsy

Reserved for selected high-risk SCC/Merkel/melanoma contexts, not routine BCC.

Caution

Photo-only reassurance

Images help monitoring but cannot replace biopsy when suspicion is high.

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.

Open skin cancer excision
Non-healing or suspicious lesions need biopsy or excision.
Large skin cancer excision defect
SCC/BCC can destroy local tissue if ignored.
Skin cancer excision closure
Histology confirms subtype and margins.

Pros, cons and controversy

Benefits, harms and the false-positive problem.

The benefit is obvious because lesions are accessible. The harm is excessive biopsies of harmless spots, but the bigger danger is ignoring a persistent non-healing lesion.

Skin Cancer detection trials immunotherapyforskincancer.com DetectCancer.org hub

Sources and trials

Good starting points.

NCI skin cancerSkin cancer overview and diagnosis. USPSTF skin cancer screeningEvidence statement for asymptomatic screening. ClinicalTrials.gov skin cancer detectionSkin imaging and detection trials.