Firm or squishy to the touch, they are totally benign. UQ CystsĪ cyst is a round lesion made of a capsule filled with keratin (the structural material that makes up the outer layer of our skin), sebum (the oil from our skin), fluid or pus-like material. This lesion looks alarming at first glance, but under a dermoscope it’s obvious by the banksia-like appearance that it’s a benign seborrhoeic keratosis. Seborrhoeic keratoses themselves are harmless, but can be prolific – some people have hundreds – and they increase in number as the years go by.
Very rarely, basal or squamous cell carcinomas arise within a pre-existing seborrhoeic keratosis. If many itchy seborrhoeic keratoses erupt suddenly, it is occasionally a sign of an internal cancer. They can erupt suddenly after a sunburn or a bout of dermatitis, or gradually appear for no discernible reason. By the age of 60 around 90% of people will have at least one seborrhoeic keratosis. These wart-like growths can begin to appear in your 30s and 40s.
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These are considered part of the normal skin ageing process. Seborrhoeic keratoses, sometimes inelegantly called senile warts or barnacles, are another common benign skin lesion. For the rest of us, self-examinations are recommended. Having many moles is the strongest predictor of a high melanoma risk, so people with many moles are often advised to have regular skin checks with a dermatologist. Many more look like moles in their early stages.Ī dermoscope helps your doctor see if your mole has hidden melanoma signs, or if it’s nothing to worry about. Moles themselves are harmless, but around 25% of melanomas arise in an existing mole. Lots of sun exposure leads to more moles, and so can using certain medications, such as those that suppress your immune system. The number of moles you have is partly controlled by genetics, but is also influenced by your environment. While some people have moles at birth, they usually begin to appear during childhood and keep developing through to your 40s, when they start to slowly disappear again. Most moles are flat but they can also be raised. They can be brown, black, pink, the same colour as the surrounding skin, or even blue if the melanocytes are clustered deep in the dermal (inner) layer of the skin. They are formed by a cluster of melanocytes, the skin’s pigment-producing cells. Moles, or naevi, are the most common skin lesions.
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Here are some of the most common, and how to tell them apart. But most of the skin lumps we develop will be benign.
In a high-UV environment like Australia, we need to be very alert to the possibility of skin cancers. As we age, the smooth skin of childhood gives way to all sorts of mysterious lumps and bumps.
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