Part I. Clinical Protocols for Diagnosis.1. History Taking and Physical Examination -- 2.Standardization in Oral Photography -- 3.Fine Needle Aspiration Cytology and Exfoliative Cytology -- 4.Biopsy of the Oral Mucosa and Histological Assessment -- 5.Protocol for Breaking Bad News.-Part II. Reactive Lesions and Non-Neoplastic Proliferative Processes -- 6.Traumatic Oral Ulcer -- 7.Recurrent Aphthous Stomatitis -- 8.Desquamative Gingivitis -- 9.Non neoplastic Proliferative Processes -- 10.Giant Cell Lesion -- Part III. Common Oral Infections -- 11.Oral Candidiasis -- 12.Oral Herpes -- Part IV. Salivary Gland Disease and Tumors -- 13.Xerostomia (dry mouth) -- 14.Mucus Extravasation and Retention Phenomena -- 15.Minor Salivary Gland Tumors -- Part V. Vascular Diseases -- 16.Vascular Anomalies of the Oral Mucosa -- Part VI. Mucocutaneous Diseases -- 17.Oral Lichen Planus -- 18.Pemphigus and Mucous Membrane Pemphigoid -- Part VII. Oral Potentially Malignant Disorders and Cancer -- 19.Actinic Cheilitis -- 20.Oral Leukoplakia and Erythroplakia -- 21.Oral Squamous Cell Carcinoma -- Part VIII. Oral Management Strategies for Patients with Special Needs -- 22.Oral Management of Cancer Patients After Multimodality Therapy -- 23.Management of Patients at Risk of Medication-Related Osteonecrosis of the Jaw -- 24.Oral Management of the Organ Transplant Patient -- 25.Oral Management of Patients Undergoing Antithrombotic Therapy -- 26.Management of Oral Lesions in HIV-positive Patients -- 27.Management of Patients with Burning Mouth Syndrome -- 28.Management of Oral Lesions in COVID-19 patients. .