GVHD Staging 0 - No GVHD rash 1 - Maculopapular rash <25% body surface area 2 - Maculopapular rash 25-50% ESA 3 - Maculopapular rash > 50% BSA 4 - Generalized erythroderma (>50% BSA) plus bullous formation or desquamation > 5% BSA #GVHD #Staging #Dermatology #Diagnosis #GraftVersusHostDisease