A keratoma is a type of benign tumour that
grows inside the foot. It originates from the
horn producing cells, usually underneath the
coronet, and grows down the foot with the
normal hoof. When they reach the white line
area at the toe, they cause separation of the
bond between the hoof wall and sole. Once
bacteria penetrate the foot, an abscess forms.
The abcess is usually associated with a widening of the white line. An x-ray or MRI scan is needed to confirm the presence of a Keratoma. An underlying keratoma will always cause the abscess to recur. The cause is unknown but can be associated with chronic irritation or trauma.