Why Melanoma Is Found Later in People of Color

Why is melanoma found later in people of color?

Melanoma is diagnosed less often in people with darker skin, but more often at a later, more dangerous stage — and the reasons are practical rather than biological destiny. Three things compound. First, skin cancer is widely pictured as a fair-skin, sunburn disease, so a spot in darker skin is less likely to be read as a warning by the person who has it, and sometimes by a clinician who sees it. Second, the melanomas that appear in skin of color more often sit in places almost no one examines — the soles of the feet, the palms, and the nail beds, a pattern described as acral lentiginous melanoma 1Ref 1National Cancer Institute (PDQ Adult Treatment Editorial Board) (2025).Melanoma Treatment (PDQ®)–Health Professional Version.Melanoma includes an acral lentiginous subtype that arises on the palms, soles, and nail beds; diagnosis is by biopsy.. Third, getting to a specialist who can biopsy a spot takes longer where dermatologists are scarce 5Ref 5Feng H, Berk-Krauss J, Feng PW, Stein JA (2018).Comparison of Dermatologist Density Between Urban and Rural Counties in the United States.Dermatologists are concentrated in metropolitan areas, creating access disparities that can delay evaluation and diagnosis for rural and underserved populations.. None of these is about the cancer being inherently worse. They are about it being found later.

'Late' means thicker — and thickness is what changes the odds

The most important word in the question is late. Melanoma is staged largely by how deeply it has grown into the skin by the time it is removed — its thickness, or Breslow depth 3Ref 3Gershenwald JE, Scolyer RA, Hess KR, et al. (2017).Melanoma staging: Evidence-based changes in the American Joint Committee on Cancer eighth edition cancer staging manual.Melanoma staging is driven largely by tumor thickness (Breslow depth) and ulceration, so a melanoma found later and thicker stages higher.. A melanoma found while it is still thin and confined to the top layer, called melanoma in situ, is usually cured simply by removing it. Five-year survival for early, localized melanoma is very high, and it falls sharply once the cancer is thicker or has spread to lymph nodes or beyond 2Ref 2National Cancer Institute, Surveillance, Epidemiology, and End Results (SEER) Program (2025).Cancer Stat Facts: Melanoma of the Skin.Five-year relative survival is very high for early, localized melanoma and falls sharply once the cancer has spread to regional nodes or distant sites.. That is the entire stakes of early versus late: not a different cancer, but a different point on the same clock. Seeing how the melanoma stages line up against thickness makes the reason detection matters concrete — every week a melanoma goes unnoticed is a week it can grow deeper.

The warning signs most people learned were built for a different melanoma

The best-known early-detection guide is the ABCDE checklist — Asymmetry, Border irregularity, Color variation, Diameter, and Evolving change — developed to help people and clinicians flag suspicious pigmented moles 4Ref 4Tsao H, Olazagasti JM, Cordoro KM, et al. (2015).Early detection of melanoma: reviewing the ABCDEs.The ABCDE criteria (Asymmetry, Border, Color, Diameter, Evolving) are the standard clinical features used to flag suspicious pigmented moles for early melanoma detection.. It is genuinely useful, but it was calibrated to the way melanoma most often looks on lighter, sun-exposed skin: an irregular brown-black mole. Acral and nail melanomas often break that mold. Under a nail, melanoma can look like a new or widening dark brown-to-black stripe running the length of the nail, sometimes with pigment spreading onto the surrounding skin. On a sole or a palm, it can be a flat, enlarging, unevenly colored patch. Because these do not match the mole people are watching for, they get mistaken for a bruise, a stain, or a callus. Knowing what early melanoma can look like in these spots is half of catching it — but no description settles it, which is why the next step is always a look by a clinician, not a self-diagnosis.

Where to actually look — and how to track it

Because the higher-risk sites in skin of color are the ones people skip, a useful self-check deliberately includes them: the soles and between the toes, the palms, the fingernails and toenails, the heels, and the inside of the mouth, alongside the usual sun-exposed areas. The method is the same everywhere — look in good light, use a second mirror or ask someone for the back and the soles, and photograph anything you are unsure about with the date, so you can compare it in a few weeks.

What you are watching for is change: a spot that is new, growing, darkening, bleeding, or simply not healing. People searching for acral melanoma in skin of color are usually looking at something harmless — a blood blister, a long-standing mole, a stain from shoes or dye. That is reassuring as a base rate, but it is not a verdict on your spot: the only way to tell a harmless mark from an early melanoma is an in-person exam and, if needed, a biopsy.

Access and delay — the other half of 'late'

Detection is only the first gate; getting seen is the second, and it is unevenly distributed. Dermatologists are concentrated in metropolitan areas, and many rural and lower-income communities have far fewer within reach 5Ref 5Feng H, Berk-Krauss J, Feng PW, Stein JA (2018).Comparison of Dermatologist Density Between Urban and Rural Counties in the United States.Dermatologists are concentrated in metropolitan areas, creating access disparities that can delay evaluation and diagnosis for rural and underserved populations.. That translates into longer waits, longer travel, and more steps between noticing a spot and having it biopsied — each of which adds time, and in melanoma, time is thickness. The path itself is a chain of handoffs — from a primary-care visit, to a dermatology referral, to the biopsy, to the result — and every link is a place where a worrying spot can sit for weeks. Cost and insurance friction add more delay on top.

None of this is the patient's failing; it is a system that makes early detection easier for some people than for others. Where an in-person visit is hard to get quickly, a primary-care clinician can examine a spot and refer onward, and teledermatology can help triage which spots need to be seen fast.

What to do — refuse the verdict, get the look

The takeaway is not a way to diagnose yourself; it is a lower threshold to be seen. If a spot on the skin, a sole, a palm, or a nail is new, changing, or not healing, the move is to photograph it, note the date, and have it examined — sooner rather than at a routine annual visit. A clinician confirms or rules out melanoma with a biopsy, ideally one that samples the full thickness so the depth can be measured accurately 6Ref 6Swetter SM, Tsao H, Bichakjian CK, et al. (2019).Guidelines of care for the management of primary cutaneous melanoma.Melanoma is confirmed by biopsy, preferably a full-thickness (excisional or saucerization) sample, so that tumor depth can be measured accurately for staging.; no scan, app, or photo substitutes for that step. If a biopsy does show melanoma, what happens after a melanoma diagnosis is a defined pathway of staging and treatment — and the earlier it was caught, the simpler that pathway tends to be. The whole reason to close the detection gap comes back to one line: in melanoma, found early is found thin.