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Table 1 Common Toxicity Criteria (CTC) version 2.0

From: Risk factors for oral mucositis in paediatric oncology patients receiving alkylant chemotherapy

Grade 0 No mucositis
Grade 1 Painless ulcers, erythema, or mild soreness in the absence of lesions
Grade 2 Painful erythema, oedema or ulcers, ability to eat solid
Grade 3 Painful erythema, oedema, or ulcers preventing swallowing or requiring hydration or parenteral (or enteral) nutritional support
Grade 4 Impossible to swallow