1. Benign & Malignant Tumours of Oral Cavity

2. Definitions Neoplasia Difference between Hyperplasia & Tumour
Tumour is an abnormal mass of tissue, the growth of which exceeds and is uncoordinated with that of normal tissues and persists in the same excessive manner after cessation of stimuli which evoked the change. - Willis

3. Hamartoma : An abnormal proliferation of tissues, native to that part
Hamartoma : An abnormal proliferation of tissues, native to that part. It is a focal malformation which resembles a neoplasm, grossly & Microscopically

4. Teratoma: A neoplasm composed of tissues not normally found in the organ, in which it arises. Derivatives of all three germ layers are seen.

5. Choriostoma: A mass formed by maldevelopment of tissue, of a type not native to that site.

6. Heteroplasia: Development of cytologic and histologic elements not native to the part.
Metaplasia: Change in tissue type after its full differentiation normally

7. Classification of Non Odontogenic Tumours
Epithelial
Benign
Papilloma
Squamous Acanthoma
Keratoacanthoma
Pigmented Cell Nevus
Premalignant
Leukoplakia
Leukoedema
Intraepithelial Carcinoma or Carcinoma in situ
Erythroplakia
Oral Sub Mucous Fibrosis
Malignant
Basal Cell Carcinoma
Epidermoid carcinoma or Squamous cell carcinoma
Verrucous Carcinoma
Spindle Cell Carcinoma
Adenoid Squamous cell Carcinoma
Lmphoepithelioma and Transitional cell carcinoma
Malignant Melanoma

8. Classification of Non Odontogenic Tumours..
Connective Tissue
Benign
Fibroma
Giant Cell Fibroma
Peripheral Ossifying Fibroma
Central Ossifying Fibroma
Peripheral Giant cell Granuloma
Central GCG
Aneursmal Bone Cyst
Myxoma
Malignant
Fibrosarcoma
Adipose tissue
Benign
Lipoma
Verruciform Xanthoma
Liposarcoma

9. Classification of Non Odontogenic Tumours…
Vascular Tissue
Benign
Hemangioma
Hereditary Haemorrhagic Talengiectasia
Encephalo-trigeminal Angiomatosis
Nasopharyngeal Angiofibroma
Lmphangioma
Malignant
Haemangioendothelioma
Haemangiopericytoma
Kaposi’s Sarcoma
Cartilage tissue
Benign
Chondroma
Benign Chondroblastoma
Chondromyxoid Fibroma
Chondrosarcoma

10. Classification of Non Odontogenic Tumours…
Bone tissue
Benign
Osteoma
Osteoid Osteoma
Benign Osteoblastoma
Malignant
Osteosarcoma
Muscle tissue
Leiomyoma
Angiomyoma
Rhabdomyoma
Leiomosarcoma
Rhabdomyosarcoma
Lymphoid Tissue
Malignant
Malignant Lymphoma
Non-Hodgkin’s Lymphoma
Reticular Cell Sarcoma
Burkitt’s Lymphoma
Hodgkin’s Disease
Leukaemias
Ewings Sarcoma
Plasma Cell Tumours
Multiple Myeloma
Plasmacytoma

11. Classification of Non Odontogenic Tumours…
Nerve Tissue
Benign
Neurofibroma
Neurolemmoma
Malignant
Malignant Schannoma
Tumour Like Lesions
Peripheral Giant Cell Granuloma
CGCG
Exostoses
Pyogenic Granuloma
Anurysmal Bone Cyst
Traumatic Neuroma
Tumours of Disputed Origin
Granular Cell Myoblastoma
Congenital Epulis
Alveolar Soft Part Sarcoma
Melanotic Neuroectodermal tumour of infancy
Kaposi’s Sarcoma
Ewing’s Sarcoma