Table 2.

Visual oral ulcerative mucositis score¹¹⁸: based on a modification of the method of Sonis et al.¹¹⁹.

Grade	Severity	Description
0		Normal (no abnormalities)
1	Mild	Partial hyperemia, erythema and swelling, with no evidence of mucosal erosion (mucosa intact)
2	Mild	Overall hyperemia, erythema and swelling and superficial erosion, may include mild sloughing
3	Moderate	Epidermolysis, hyperemia and erythema; moderate mucositis characterized by frank ulcer formation. Ulcers typically have areas of necrosis (erosion) with associated yellowish/grey coloration with pseudomembrane formation
		Cumulative area of ulceration ≤ 25% of tongue surface area
4	Severe	Extensive epidermolysis and bleeding; severe mucositis with ulcer formation affecting 25–50% of tongue or buccal mucosal area. Marked erythema and pseudomembrane formation. Loss of pliability
5	Severe	Bleeding and abscesses; virtually complete ulceration of the mucosa, all mucosa areas at risk. Loss of mobility and pliability