Zhang Ruifang is a 101-year-old grandmother of Linlou Village in Henan province of China.
Family members did not much pay attention to the skin outgrowth in her left forehead when it appeared in 2009, according to her youngest son, 60-year-old Zhang Guozheng.
"But as time went on, a horn grew out of her head and it is now 6cm long," said Guozheng.
The condition is termed "cutaneous horn" that refers to a conical projection above the skin's surface that may resemble a small horn.
The horn is made of keratin similar to the component of fingernails. They usually occur in sun-exposed areas among elderly adults but can also occur in non-exposed areas.
More than half do not cause cancer but 20 percent turn out to be malignant.
Now, the family is worried because another growth is seen on the right side of the forehead.
The centenarian woman has seven children, six men and a woman, and many grandchildren. Her eldest son is 82 years old.
She feels no pain however, and lives a quiet peaceful life.
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