Amelanotic Melanoma - Symptoms, Causes & Treatment
Medically reviewed by Dr. Anand S. Urhekar, MD, MD Pathology, Clinical Advisor · Last updated July 2026
A melanoma that produces little or no melanin, so instead of being brown or black it looks pink, red, skin-coloured or faintly grey. Because it lacks the classic dark colour, it is frequently mistaken for a harmless spot, scar or benign lesion, and is often diagnosed later than pigmented melanoma.
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Quick Answer
Amelanotic melanoma is a melanoma with little or no pigment, so it appears pink, red, white or skin-coloured rather than brown or black. Roughly 2–8% of melanomas are amelanotic. Because the ABCDE colour rule fails, watch instead for the EFG signs: a lesion that is Elevated, Firm and Growing over weeks. Any new or changing pink lump that persists beyond a month needs in-person dermatology review.
Symptoms
- Pink, red, white or skin-coloured papule, nodule or patch
- Firm to the touch and raised above surrounding skin
- Grows steadily over weeks to months
- May itch, crust, bleed or fail to heal
- Sometimes a faint brown or grey rim at the edge
Causes & Risk Factors
- Cumulative and intermittent ultraviolet exposure
- Fair skin, red or blonde hair, blue eyes
- Personal or family history of melanoma
- Many moles or atypical (dysplastic) naevi
- Immunosuppression
Treatment & Management
- Urgent dermatology referral and diagnostic excision biopsy
- Wide local excision with margins determined by Breslow thickness
- Sentinel lymph node biopsy for thicker lesions
- Immunotherapy or targeted therapy for advanced disease
- Lifelong skin surveillance after treatment
When to See a Doctor
See a doctor without delay about any pink or skin-coloured lump that is firm, raised and growing, or any spot that bleeds, crusts or does not heal within four weeks.
Frequently Asked Questions
Why is amelanotic melanoma so easily missed?
The ABCDE rule relies heavily on dark colour and irregular pigment. Amelanotic melanoma has neither, so it is often dismissed as a spot, cyst, scar or basal cell carcinoma. The EFG rule — Elevated, Firm, Growing — is more useful for these lesions.
How common is amelanotic melanoma?
It accounts for roughly 2–8% of all melanomas, though rates are higher in people with red hair and very fair skin, and in nodular melanoma subtypes.
Can an AI photo check detect amelanotic melanoma?
Photo-based tools are far less reliable for pigment-free lesions, because most were trained on pigmented images. Treat any negative result as meaningless for a growing pink lump and see a clinician in person.
Related Conditions
Medical References
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Medical Disclaimer: This information is for educational purposes only and is not intended as medical advice. The content on this page should not be used to diagnose or treat any health problem. Always consult with a qualified healthcare professional for proper medical evaluation, diagnosis, and treatment of your condition.