Interdigital hyperplasia is a thickening of the interdigital skin which causes a masses to protrude between the claws. One or more feet may be involve but the hind feet are more commonly affected. Beef breeds, especially bulls, have a higher incidence of corns but the frequency in dairy cattle is on the increase.
Fibromas develop in response to chronic irritation between the claws. Hereditary predisposition is suspected. Spreading of the toes and other conformational problems probably contribute to irritation of the interdigital skin.
The site of the mass varies from a noticeable thickening of the skin to a size of 3 cm or more. A large mass can cause pain and the fibroma may become eroded, ulcerated and/or infected leading to more swelling and pain. Lameness varies, depending on the size of the mass, from abscent to severe. Size of the corn and degree of lameness are guides in determining whether or not removal is necessary.
REMOVAL
Anesthesia and Restraint:
- Cast and tie - may stretch animal between a post and another solid object. Table works nicely.
- Local infiltration or retrograde perfusion.
Procedure:
Excise all excessive tissue - may go down to interdigital cushion but not further. Best to be a little cautious here.
- If lesion is small can be cauterized or burned off by branding iron, charcoal starting iron, or cautery iron.
- Cryosurgery is also used. Have to insulate normal areas well.
- If lesion is large, remove interdigital fat also.
Post-Operative Care:
- Wire toes together - this decreases actual interdigital area to heal, and helps to control hemorrhage. Leave wires in until they break.
- Leave bandage on for 7-10 days, then change.
- Antibacterial ointments.