Surgeons operated to remove a four-inch devil horn from the top of a mans head.
Shyam Lal Yadav, 74, said the protruding horn started growing around five years ago, after he bumped his head.
At first, it was kept under control by his barber.
But the farmer said it soon became hard and got so long he had to seek help from doctors.
The growth – called a sebaceous horn – is understood to be made of keratin, found in toenails and human hair.
Neurosurgeons at Bhagyoday Tirth Hospital in Sagar city, India, removed the lump and he is now recovering.
Surgeon Dr Vishal Gajbhiye said: Around five years ago the patient had hurt his head after which a lump started growing.
Initially, he ignored it as it did not cause any discomfort. Also, he got the growth cut by the local barber.
But, when the lump hardened and started growing further, he approached the hospital at Sagar.
In medical term, this type of rare growth is called sebaceous horn (devils horn).
As the horn is composed of keratin, the same material found in fingernails, the horn can usually be removed with a sterile razor.
However, the underlying condition will still need to be treated.