Table 2 Digital dermatitis M-score and descriptors [69, 70]
M-stage | Descriptor |
|---|---|
M0 | “No sign of pre-existing lesion. Normal skin” |
M1 | “Small (< 2 cm across) focal active state. Circumscribed lesion” |
M2 | “Larger (> 2 cm across) ulcerative active stage. Can be painful on manipulation” |
M3 | “Healing stage. The ulcerative surface is transformed to a dry brown, firm rubbery scab. No pain on manipulation” |
M4 | “Chronic stage. Surface is raised by tan, brown, black, rubbery, irregular, proliferative hyperkeratotic growths that vary from papilliform to mass-like projections” |
M4.1 | “Chronic stage with small active M1 focus” |