Moles Or Pigmented Nevi
February 10, 2009
Certain cells like melanocytes or nevus cells produce pigment or colour. A growth in these kinds of cells causes moles. They are non-cancerous skin growths that can appear anywhere, as long as there is skin in that area.
They may be present at birth or may develop early in life. Apart from being unaesthetic to look at, they offer no risk. However, chances are for some of them to become cancerous.
It may be small in size at the start and may grow larger with time. Sometimes they also disappear or change in appearance over time. However, some types remain as they are.
Causes
Melanocytes are responsible for the natural colour of the skin. When these cells come together as a cluster instead of spreading out in the skin, moles appear.
Some moles are present at birth while some appear spontaneously or because of sun exposure.
Risk involved in moles
Usually moles are pretty harmless and mostly they are non-cancerous. However, if you have a history of malignant melanoma in the family, you should take care about moles.
If the mole becomes itchy and painful along with increasing in size and becoming irregular, mainly at the edges, it can be a cause of concern. A mole getting darker in colour or becoming mottled and even spontaneously bleeding should also be cared for immediately.
Treatment of moles
First, the mole needs to be checked if it is cancerous or not. This is done by taking a biopsy in which a small tissue sample of the mole is taken. In case of a cancerous mole, the dermatologist will get rid of the entire mole.
Usually a mole is removed by shave excision or by elliptical excision or by laser treatment.
Shave excision
This simply means shaving off the mole. This is a cosmetic procedure usually applied to raised moles. The mole is removed by numbing the area. Usually, a side effect of this procedure is that the mole often grows back or re-pigmentation occurs at the same site, but much darker than the original mole.
Elliptical excision
This technique is used mainly for removing cancerous moles. In this case, along with the mole, the surrounding as well as underlying tissue is removed in the shape of an ellipse.
Laser treatment
Lasers will cause much less bleeding because they will seal the blood vessels and evaporate the tissue. This leads to reduced scarring. Usually, a scab forms after the treatment, which falls off leaving a red mark. This mark also disappears in time.
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