Evolution of Brain Magnetic Resonance Imaging Lesions in Dogs Treated for Meningoencephalomyelitis of Unknown Origin Between Initial Diagnosis and Relapse

Before a clinical relapse at approximately 6 months, remission of the initial pathologic process and development of new lesions appear unlikely. Beyond this period, new lesions may occur with or without remission of the initial pathologic process, and repeat MRI is of high diagnostic and clinical value in detecting new lesions and characterizing the underlying pathologic process.