A 1-Millimeter Change: The Subtle Shifts That Signal Skin Cancer
Dermatologists warn that small alterations in symmetry or bleeding can indicate malignancy, often appearing in hidden areas like behind the ears or under nails.
By Ethan Cook ·
A millimeter of growth in a mole can signal a dangerous change, according to gerontologist Sam Cradduck. This subtle shift is part of a set of warning signs that often go unnoticed as people age, including sores that refuse to heal and moles that bleed easily.
Dr. Rhea Rogers, a board-certified physician, explains that doctors evaluate lesions using the ABCDE method: asymmetry, border, color, diameter, and evolving appearance. Rogers notes that patients should track these changes over time, as a spot that has existed for years can still become cancerous. She emphasizes that a change in symmetry or a new bleeding pattern requires attention, regardless of how long the mark has been present.
While public health campaigns often focus on sun-exposed areas like the shoulders and back, Rogers points out that skin cancer can hide in less obvious locations. These include behind the ears, between the toes, and underneath the nails. She advises that a professional exam or assistance from another person is necessary to inspect areas such as the scalp that are difficult to see.
The danger of these hidden spots lies in their unassuming appearance. Rogers states that these lesions do not always look scary, which can make them more dangerous. Squamous cell and basal cell cancers, for example, may appear as pinkish, itchy sores rather than the dark moles associated with melanoma.
Amy O’Rourke, an aging expert, shared her own experience after visiting a dermatologist for a brown spot on her cheek. A full-body scan revealed a squamous cell cancer on top of her head. She underwent surgery to remove the cancer. O’Rourke noted that approximately three-quarters of her family has had skin cancer, linking the risk to both genetic and environmental factors.
Katherie Ambrose, an aging well coach, recently underwent a full-body scan and encouraged her husband to do the same. Rogers suggests patients check with their insurance providers, as some plans cover an annual dermatology exam similar to a well-woman exam. She recommends requesting a full-body exam and mole mapping to track changes over time.
Rogers also addressed the role of sun protection. She warned that UVA and UVB light is invisible and can pass through glass. Melanoma is linked to intense, intermittent sunburns and spreads quickly. She debunked the myth that darker skin tones do not require sunscreen, stating that sunscreen protects cells and DNA from damage for everyone.
