Table 1.

Sakita–Miwa classification.

Stages	Findings
Active stage
A1	Ulcer that contains mucus coating, with marginal elevation because of edema
A2	Mucus-coated ulcer with discrete margin and less edema than active stage 1
Healing stage
H1	Unhealed ulcer covered by regenerating epithelium <50%, with or without converging folds
H2	Ulcer with a mucosal break but almost covered with regenerative epithelium
Scaring stage
S1	Red scar with rough epithelialization without mucosal break
S2	White scar with complete re-epithelialization