Pigmented Lesions of the Oral Cavity Bacterial Lesions of the Oral Mucosa Herpesvirus-Related Lesions of the Oral Mucosa Lichenoid Lesions of the Oral Mucosa Vesiculobullous Lesions of the Oral Cavity Ulcerative and Inflammatory Lesions of the Oral Mucosa Oral Lesions Associated with Systemic Disease Reactive and Nonreactive White Lesions of the Oral Mucosa Acute Immune-Mediated Lesions of the Oral Cavity Plasma Cell Gingivitis and Its Mimics Fungal Lesions of the Oral Mucosa Diagnosis and Management