Mucositis grading scales RTOG

The Radiation Therapy Oncology Group (RTOG) has developed the Acute Radiation Morbidity Scoring Criteria for the evaluation of Radiotherapy treatments.

The RTOG grading is reliant on a clinician's ability to judge the anatomical changes associated with oral mucositis (size and characteristics of ulceration).

RTOG Scoring Criteria



0 (none)

No change over baseline

I (mild)

Irritation, may experience slight pain, not requiring analgesic

II (moderate)

Patchy mucositis that may produce inflammatory serosanguinitis discharge; may experience moderate pain requiring analgesia

III (severe)

Confluent, fibrinous mucositis, may include severe pain requiring narcotic

IV (life-threatening)

Ulceration, hemorrhage, or necrosis



Trotti et al. Int J Radiat Oncol Biol Phys 2000; 47:13-47.
Sonis et al. Cancer 2004; 100(9 Suppl):1995-2025.


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