Page 996 - Problem-Based Feline Medicine

988 PART 11 CAT WITH AN ABNORMAL GAIT

OSTEOCHONDROSIS DISSECANS Clinical signs
Vague, progressive hindlimb lameness.
Classical signs
May be bilateral.
● Onset of forelimb lameness in the cat less
than 1 year of age.
Diagnosis
Pathogenesis Radiographically, see radiolucency of the femoral
neck and proximal femoral metaphysis.
Very rare in the cat.
Has been reported as cause of shoulder lameness.
Differential diagnosis
Occurs due to a defect in osteochondral ossification.
Traumatic fracture of the femoral neck.
Clinical signs
Treatment
Insidious forelimb lameness in cats less than 1 year of
age. Femoral head and neck osteotomy.

Pain identified on full extension and flexion of the
shoulder joint. Prognosis
Excellent.
Diagnosis

Radiographically a thickened flap of cartilage or joint FELINE MUCOPOLYSACCHARIDOSIS
mouse can be identified in the shoulder joint.
Classical signs
Treatment
● Rare inherited disorder in Siamese and
Surgical removal of the cartilaginous flap. Siamese cross cats.
● Causes a stiff gait and paraparesis.
Prognosis ● Cats also have a broad maxilla, corneal
clouding, pectus excavatum and
Excellent. neurological abnormalities.

FEMORAL NECK METAPHYSEAL Clinical signs
OSTEOPATHY Rare inherited disorder that occurs as a result of a lyso-
somal enzyme deficiency in Siamese and Siamese cross
Classical signs cats.
● Onset of hindlimb lameness in the cat less Usually present at less than 6 months of age.
than 1 year of age.
Typically have dysmorphic facial features (a broad
maxilla), plump paws (from thickened skin) and
corneal clouding.
Pathogenesis
Generally exhibit a stiff gait and paraparesis with dif-
Uncommon condition.
fuse neurological signs.
Reported in male cats less than 2 years of age.
Also present with a chronic mucoid ocular discharge
Idiopathic necrosis of femoral neck. and chronic respiratory tract infections.