Table 1.

Microscopic evaluation scheme of healing burn wounds

	Grade 0	Grade 1	Grade 2	Grade 3	Grade 4
Inflammation
Neutrophils*		Mild	Moderate	Marked	Severe
Eosinophils*		Mild	Moderate	Marked	Severe
Lymphocytes & plasma cells	0 to 5 Organized Units	6 to 10	11 to 15	16 to 20	>21
Histiocytes/MNGC†/mineral	<10%	10 to 25%	up to 50%	up to 75%	>80%
Dermal Response
Blood/edema	<10%	10 to 25%	up to 50%	up to 75%	>80%
Necrosis, stromal	<10%	10 to 25%	up to 50%	up to 75%	>80%
Granulation tissue	<10%	10 to 25%	up to 50%	up to 75%	>80%
	Characterized by fibroblasts and increased density of small caliber capillaries
Mature dermis	<10%	10 to 25%	up to 50%	up to 75%	>80%
	Characterized by mature, dense collagen and fibrocytes
Dermal wound bed	Measure Length
Epithelial Response
Epithelial proliferation	>3× or healed wound	2.5×	2×	1.5×	≤Normal thickness
Epithelial gap	<40% Open	Up to 40%	Up to 60%	Up to 80%	>100%

^*Details provided in Table 2.

^†Multinucleated giant cells.