A small brown mark on the shoulder can be easy to explain away after a summer at the beach, weekends on the boat or years of outdoor work. This delayed melanoma example shows why waiting for a spot to become painful, dramatic or unmistakably dangerous can be a costly mistake. Melanoma may be highly treatable when found early, but it can become far more serious when it has time to grow deeper into the skin or spread.
A delayed melanoma example: how waiting can happen
Consider a hypothetical but realistic situation. A 46-year-old Victorian notices a dark, flat spot near the top of their back while getting dressed. It is not sore, itchy or bleeding. They assume it is a sunspot and decide to keep an eye on it.
Over the next several months, the mark gradually becomes wider and less even in colour. Because it changes slowly and is in a hard-to-see area, it is not checked regularly. Work is busy, booking a skin check feels inconvenient, and the person reassures themselves that it has probably always looked that way.
A year later, a partner notices that the spot has a jagged edge and several shades of brown, black and pink. A GP or skin cancer clinician examines it with a dermatoscope and arranges a biopsy. The result confirms melanoma.
This example does not mean every changing spot is melanoma. Many benign lesions change or look unusual. The critical point is that no one can safely judge a suspicious lesion by appearance alone, particularly without a close clinical examination. A prompt assessment may identify a harmless spot and provide reassurance. If it is melanoma, speed can make a meaningful difference to treatment options and outcomes.
Why melanoma can be delayed
Delayed diagnosis is rarely about carelessness. Melanoma can be subtle, and people often have reasonable-sounding explanations for what they see. A mark may look like a freckle, insect bite, scar, pimple or ageing spot. It may be hidden in hair, on the back, behind the ears, between the toes, under a nail or in an intimate area.
There is also a persistent myth that melanoma must be raised, black or painful. In reality, melanomas can be flat or raised, pale, pink, red, brown, black, blue-grey or mixed in colour. Some cause no symptoms at all. Waiting for pain is particularly risky because early melanoma often does not hurt.
Australians face a high level of ultraviolet exposure, especially people who work outdoors, spend time on the water, play sport, or have had repeated sunburn. Yet melanoma can occur in people of any skin tone and on areas that receive little obvious sun exposure. People with darker skin may be more likely to have lesions overlooked or assessed later, including on the soles, palms and nails.
A personal history of skin cancer, many moles, a strong family history of melanoma, a weakened immune system, or past use of solariums can also raise risk. Risk factors matter, but they are not a reason to ignore a suspicious spot in someone without them.
What changed in this melanoma example
In the example above, the warning was not one single feature. It was evolution. The mark became larger, developed irregular borders and showed uneven colour. Change is one of the clearest reasons to arrange a skin check.
The ABCDE guide can help you notice changes worth assessing:
- A – Asymmetry: one half does not match the other.
- B – Border: the edge is irregular, blurred, scalloped or notched.
- C – Colour: there is more than one colour, or the spot looks different from surrounding moles.
- D – Diameter: it is growing, particularly if it is larger than about 6 mm. Smaller melanomas can still occur.
- E – Evolving: it changes in size, shape, colour, surface or sensation, or starts bleeding, crusting or itching.
The “ugly duckling” sign is equally useful. Most people’s ordinary moles have a recognisable pattern. A lesion that looks noticeably different from the rest deserves attention, even if it does not neatly match every ABCDE feature.
Some melanomas grow more quickly than others. Nodular melanoma, for example, may appear as a new raised lump that is firm, enlarging and often dark, red or skin-coloured. It may not follow the usual ABCDE pattern. A new lump that grows over weeks or months should be checked promptly.
When to book a skin check
Book a GP appointment or skin check as soon as possible if you notice a new or changing lesion, particularly one that stands out from your other marks. Do not wait for your next annual check if a mole is evolving now.
A non-healing sore, a spot that repeatedly bleeds or crusts, a dark streak under a nail, or a lesion that becomes tender or itchy also needs assessment. These signs do not confirm melanoma, but they are not symptoms to manage with guesswork or over-the-counter treatments.
If a lesion is rapidly changing, bleeding without obvious injury, or you are worried it may be melanoma, contact a clinician urgently. Tell the receptionist why you are seeking an appointment so the concern is clear. If you cannot access your usual doctor promptly, seek another appropriate local service rather than simply waiting.
A clinician may examine your entire skin, not only the spot that prompted the visit. They may use dermoscopy, a handheld device that helps them see structures beneath the skin surface. If a lesion is suspicious, a biopsy or complete removal may be recommended. This is the only way to diagnose melanoma with certainty.
What to do while waiting for your appointment
Take a clear, well-lit photograph of the lesion with the date recorded. Including a ruler or coin beside it can help show scale, but do not rely on photos as a substitute for assessment. Lighting, camera quality and angle can conceal changes, and image-based checks have limitations.
Avoid picking, shaving or trying to remove the lesion yourself. Do not use acid treatments or assume a cream will solve a spot that is persisting or changing. Continue ordinary sun protection: seek shade, wear protective clothing and a broad-brimmed hat, use sunglasses, and apply SPF 50+ broad-spectrum sunscreen correctly when UV exposure is expected.
It can also help to ask a partner, family member or trusted friend to look at places you cannot easily see, such as your scalp and back. This is particularly valuable for people with many moles or a history of skin cancer. Still, a second pair of eyes is not a clinical diagnosis.
The trade-off is simple: reassurance now or uncertainty later
People sometimes delay because they worry about overreacting or wasting a clinician’s time. A skin check is an appropriate use of care when a lesion is changing, unusual or concerning. The alternative is allowing uncertainty to continue while a possible melanoma develops.
Not every suspicious mark will be cancer. Some will be benign moles, seborrhoeic keratoses, sunspots or other common skin changes. That is good news, not a reason to self-diagnose. Early assessment gives you a clear answer and, where treatment is needed, the best chance to deal with the problem before it becomes more complex.
For Australians, the practical message is direct: know what is normal for your skin, check it regularly, and act on change. Every minute counts when melanoma is a possibility. If a spot is new, evolving or simply does not look right, book a professional skin check and let certainty replace waiting.