Inclusion Criteria:  All patients were affected by oral mucositis (9 RIOM, 6 chemotherapy-related oral mucositis). They were treated with almost 2 different systemic therapies before and during platelets gel applications. Median of time before the lesions were treated with platelets gel were 7 days. Lesions affected buccal mucosa, tongue, labial commissure and lower lip. Preliminar parameters were the microbiological contamination of lesions and presence of pain.  Exclusion Criteria:  Systemic Healthy Patients