Polymyositis is a relatively common myopathic disorder in dogs but is less common in cats. Some forms of myositis have been shown to be immune-mediated, while others are infectious and some are idiopathic. The clinical signs are weakness of gait muscles, swelling, pain and muscle atrophy. Serum...

Case Description - A 4-year-old domestic shorthair cat was evaluated for a 1-week history of shifting limb lameness that progressed to tetraparesis. Clinical Findings - Physical examination revealed generalized muscle atrophy and signs of discomfort when the muscles of the appendicular skeleton...

Global importance: Hypokalaemic polymyopathy is a genetic disease of Burmese cats that has been encountered in Australasia, Europe and South Africa. Clinical features: Affected cats usually present with signs of muscle weakness and muscle pain in the first year of life. Although certain clinical...

Mediastinal tumors are very seldom in dogs and cats. If they occur however, thymomas and lymphomas are most often recognized. Although no breed predilection is known, medium and large dogs, especially German shepherds and Retrievers, may be over-represented. Thymomas originate from thymic...

Part I of this review introduces the immunological basis and clinical presentation of systemic diseases, including systemic lupus erythematosus (SLE), "SLI overlap syndromes", polymyositis and canine keratoconjunctivitis sicca.