Review Article
Immunomodulatory Role of Mesenchymal Stem Cell Therapy in Vascularized Composite Allotransplantation
Table 2
The Banff 2007 working classification of skin-containing composite tissue allograft pathology [
39].
| Banff Grade | Rejection severity | Histopathological features |
| 0 | No rejection | No or rare inflammatory infiltrates | 1 | Mild | Mild perivascular infiltration and no involvement of the overlying epidermis | 2 | Moderate | Moderate-to-severe perivascular inflammation with or without mild epidermal and/or adnexal involvement | No epidermal dyskeratosis or apoptosis | 3 | Severe | Dense inflammation and epidermal involvement with epithelial apoptosis, dyskeratosis, and/or keratinolysis | 4 | Necrotizing acute rejection | Frank necrosis of epidermis or other skin structures |
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