Mucositis grading scales WHO


The World Health Organization has developed a grading system for mucositis based on clinical appearance and functional status.

The WHO scale is dependent on both objective and subjective variables, and measures anatomical, symptomatic as well as functional components of oral mucositis.
WHO Oral Mucositis Grading Scale



Grade Description
0 (none) None
I (mild) Oral soreness, erythema
II (moderate) Oral erythema, ulcers, solid diet tolerated
III (severe) Oral ulcers, liquid diet only
IV (life-threatening) Oral alimentation impossible






WHO Handbook 1979, pp.15-22.
Sonis et al. Cancer 2004; 100(9 Suppl):1995-2025.



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