| Normal | Inflammatory | Cystic | Drugs |
| • Pterygoid hamulus | • Abscess | • Eruption cysts | • Phenytoin |
| • Parotid papillae | • Pyogenic granuloma | • Developmental cysts | • Cyclosporin |
| • Lingual papillae | • Crohn's disease | • Cysts of infective origin | • Calcium channel blockers |
| • Unerupted teeth | • Orofacial granulomatosis | Fibro-osseous | Blood dyscrasias |
| Developmental | • Sarcoidosis | • Fibrous dysplasia | • Leukaemia and lymphoma |
| • Haemangioma | • Wegener's granulomatosis | • Paget's disease | Neoplasms |
| • Lymphangioma | • Others | Hormonal | • Benign and malignant |
| • Maxillary and mandibular tori | Traumatic | • Pregnancy epulis or gingivitis | Others |
| • Hereditary gingival fibromatosis | • Epulis | • Oral contraceptive pill gingivitis | • Angio-oedema |
| • Von Recklinghausen's | • Fibroepithelial polyp | • Amyloidosis | |
| neurofibromatosis | • Denture granulomas | ||