Fig. 3

Photographs of a mixed breed dog with progressive depigmentation and inflammatory myopathy involving the masticatory muscles. (A) Appearance at approximately 3 years and 4 months of age (2 years and 5 months after owner reported onset of cutaneous clinical signs). Note marked iridal color change and severe masticatory muscle atrophy. (B) Appearance at approximately 4 years and 3 months of age (3 years and 4 months after owner reported onset of cutaneous clinical signs). Note depigmentation of the nose and oral mucocutaneous junctions, as well as iridal color change, marked ptyalism, and inability to close the mouth