Hamelin mentions a case of this nature.

It is said that all his life Sir William Elliot was annoyed by passing hairs in urination.

They would lodge in the urethra and cause constant irritation.

At his death a stone was taken from the bladder, covered with scurf and hair.

Hall relates the case of a woman of sixty, from whose bladder, by dilatation of the urethra, was removed a bundle of hairs two inches long, which, Hall says, without a doubt had grown from the vesical walls.
Retention of Foreign Bodies in the Pelvis .-- It is a peculiar fact that foreign bodies which once gain entrance to the pelvis may be tolerated in this location for many years.