Oral mucositis (OM) is a side effect of many cancer treatments

Oral mucositis: an inflammation of mucous membranes in the mouth, which usually appears as red, ulcer-like sores1,2

OM incidence

In patients being treated for cancer, likelihood of experiencing OM varies by tumor type and treatment regimen.

By tumor type

Head and neck cancer receiving radiation therapy3
Hematopoietic stem cell transplant4
Breast cancer5
Head and neck cancer receiving chemotherapy5

Colorectal cancer5
Malignant lymphoma5
Non–small-cell lung cancer6

By targeted therapy


Additional targeted therapeutics associated with risk of OM include bevacizumab, cetuximab, erlotinib, gefitinib, and sorafenib.11


OM continues to be a problem for patients undergoing treatment for cancer.1,12 Management of OM should be considered for patients who face OM associated with treatment of cancer.1,12,13

The WHO Oral Toxicity Scale

The WHO (World Health Organization) classification of oral toxicity combines descriptions of mucosal changes, pain, and functionality into a single composite score.1,14,15



Help patients learn more about oral mucositis. Download the Oral Mucositis Overview for Patients here.