Table 2.

Acute graft-versus-host disease staging of individual organ involvement (59).

	Stage 0	Stage 1	Stage 2	Stage 3	Stage 4
Skin	No rash	Rash <25% of BSA	25–50% BSA	>50% generalized erythroderma	Plus desquamation and bullae
Gut	Diarrhea < 10 ml/kg/day	10–19.9 ml/kg/day	20–30 ml/kg/day	>30 ml/kg/day	Severe abdominal pain ± ileus, frank blood, or melena
UGI	–	Severe nausea/vomiting	–	–	–
Liver	Bilirubin ≤2 mg/dL	2.1–3 mg/dL	3.1–6 mg/dL	6.1–15 mg/dL	>15 mg/dL