Clinical differential diagnoses for canine DM and DM - like disease include juvenile - onset demodicosis, dermatophytosis,
facial pyoderma, and discoid lupus erythematosus.
Further to this paper published by Douglass K. Macintire, DVM, MS, DACVIM, DACVECC, this disease is characterised by
facial swelling, lymphadenopathy, deep
pyoderma of the head and face, fever, depression etc..