It is apparently unrelated to other lesions of the skeletal or blood systems, and occurs only in the canine, more in some breeds than others. (siriusdog.com)
The same rules were applied to a validation cohort of 20 patients (13 with MS and 7 with other lesions) by a blinded observer. (sciencedaily.com)
Other lesions include crusts, erythema, hyperpigmentation, and lichenification. (2ndchance.info)