A Journal of Investigative Dermatology study finds that how moles are distributed across the skin — not just how many there are — may matter for melanoma risk.
A single mole has long been considered less significant than the total count. But a study published in the Journal of Investigative Dermatology suggests the picture is more layered than that.
The presence of many melanocytic naevi — the clinical term for moles — on the skin is an established melanoma risk factor, according to research cited by Gandini and colleagues in 2005. What is newer is the finding that distribution matters too.
Recent studies have found that moles appearing in clusters, rather than scattered individually, carry their own association with melanoma risk, according to work by Chousakos and colleagues in 2022 and Jayasinghe and colleagues in 2023. The specific pattern under examination is known as a satellite naevus: a smaller mole positioned in close proximity to a larger one.
Nearly 30% of melanomas arise from, or immediately adjacent to, a pre-existing naevus, according to a 2017 analysis by Pampena and colleagues. That figure has helped focus research attention on satellite naevi as a potential early marker worth tracking.
The Journal of Investigative Dermatology study set out to measure how often satellite naevi appear — both in people already considered at high risk for melanoma and in broader population-based groups. The findings build a clearer picture of how clustering patterns might one day inform screening and monitoring protocols.
For people with albinism, who have reduced or absent melanin and face significantly elevated UV-related skin cancer risk, developments in melanoma detection carry particular weight. Reduced pigmentation can make individual naevi harder to distinguish visually, and any tool that sharpens clinical risk assessment is directly relevant to dermatological care within this community.
Keywords
Core topics and entities mentioned in this summary.