March 09, 2010
Her youngest of six sons, Zhang Guozheng, 60, said when a patch of rough skin formed on her forehead last year ‘we didn't pay too much attention to it’.
‘But as time went on a horn grew out of her head and it is now 6cm long,' added Mr Zhang, whose eldest brother and sibling is 82 years old.
‘Now something is also growing on the right side of her forehead. It’s quite possible that it’s another horn.’
Although, it is unknown what the protrusion is on Mrs Zhang’s head, it resembles a cutaneous horn.
This is a funnel-shaped growth and although most are only a few millimetres in length, some can extend a number of inches from the skin.
Cutaneous horns are made up of compacted keratin, which is the same protein we have in our hair and nails, and forms horns, wool and feathers in animals.
They usually develop in fair-skinned elderly adults who have a history of significant sun exposure but it is extremely unusual to see it form protrusions of this size.
The growths are most common in elderly people, aged between 60 and the mid-70s. They can sometimes be cancerous but more than half of cases are benign.
Common underlying causes of cutaneous horns are common warts, skin cancer and actinic keratoses, patches of scaly skin that develop on skin exposed to the sun, such as your face, scalp or forearms.
Cutaneous horns can be removed surgically but this does not treat the underlying cause.
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