1062 DISEASES OF THE FOOT. 



and a dressing applied to check bleeding, which is sometimes severe, 

 and may necessitate the use of the actual cautery. 



The deferred complications which follow severe accidents like those 

 due to an omnibus wheel passing over the coronet, must be combated 

 as they arise. Deformity of the foot, the growth of large exostoses 

 and lameness can be treated respectively by the use of the farrier's 

 rasp and knife, by firing and by neurectomy. 



Sub-coronary cellulitis. The abundant connective tissue under- 

 lying the coronary band is in intimate connection with the subcutaneous 

 connective tissue of the coronary region, and is related below to the 

 parachondrium, and through this to the nbro-fatty frog ; it contains 

 the coronary venous plexus. 



Injuries to the coronet, like treads and brushing wounds, often 

 lead to inflammatory infection of this connective tissue (cellulitis 

 of the subcoronary connective tissue). As a rule, the disease is 

 confined to one side of the hoof, but sometimes extends to the other, 

 so that the swelling involves the entire coronet. 



The condition is ushered in by swelling of the coronet, and is 

 accompanied by great pain, especially when weight is placed on the 

 foot. The lameness is in direct proportion to the swelling, and is 

 usually so severe as to prevent the animal standing firmly on the 

 foot. The lymph vessels above the hoof are sometimes swollen, 

 though this cannot always be detected with certainty. Rotation 

 of the phalanges causes much pain. 



The disease shows a great resemblance to purulent inflammation 

 of the pedal-joint, and the diagnosis may for a time appear doubtful. 

 Lameness, appearing simultaneously with swelling, points to primary 

 subcoronary cellulitis ; in secondary cellulitis, due to purulent inflam- 

 mation of the joint, the swelling is preceded by severe lameness. 

 And further, while in primary cellulitis pain generally diminishes 

 after discharge occurs, in purulent disease of the pedal-joint it 

 persists. 



The course of subcoronary cellulitis is usually unfavourable. 

 Sometimes laminitis results from the animal continually standing 

 on the other foot, or the patient dies from decubitus ; sometimes 

 the disease extends to the lateral cartilage and produces quittor, 

 but not infrequently septic inflammation occurs in the coronary 

 band, destroys extensive tracts of tissue, and leads to a fatal result. 

 Purulent inflammation of the pedal-joint, produced by extension 

 of the cellulitis, is a frequent complication. Its onset is characterised 

 by increase of pain ; and if inflammation had not previously extended 

 beyond one-half of the hoof, by the swelling involving the entire 



