Centenarian Zhang Ruifang, of Linlou Village in China’s Henan Province, first started developing the strange growth in 2009, when a patch of rough skin appeared on the left side of her forehead.

Her youngest son, 60-year-old Zhang Guozheng, said that when the growth first appeared they ‘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,’ he said.

The growth is thought to be a ‘cutaneous horn’ – a tumour composed of keratin, the same substance that makes up fingernails, which most commonly occur in elderly people. Normally cutaneous horns are very small, several larger ones, which can stretch several inches, have been recorded in the past.

The condition has left her family worried – especially now it seems that she is developing a second horn on the right side of her forehead to match the first.

[Source]