OPM-Definitions _ Clasifications-16-12-14.ppt

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1. Benign & Malignant Benign & Malignant
Tumours of Oral CavityTumours of Oral Cavity

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

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

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

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

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

7. Classification of Non Odontogenic TumoursClassification of Non Odontogenic Tumours
EpithelialEpithelial
–BenignBenign
PapillomaPapilloma
Squamous AcanthomaSquamous Acanthoma
KeratoacanthomaKeratoacanthoma
Pigmented Cell NevusPigmented Cell Nevus
–PremalignantPremalignant
LeukoplakiaLeukoplakia
LeukoedemaLeukoedema
Intraepithelial Carcinoma Intraepithelial Carcinoma
or Carcinoma in situor Carcinoma in situ
ErythroplakiaErythroplakia
Oral Sub Mucous Oral Sub Mucous
FibrosisFibrosis
–MalignantMalignant
Basal Cell CarcinomaBasal Cell Carcinoma
Epidermoid carcinoma Epidermoid carcinoma
or Squamous cell or Squamous cell
carcinomacarcinoma
Verrucous CarcinomaVerrucous Carcinoma
Spindle Cell CarcinomaSpindle Cell Carcinoma
Adenoid Squamous cell Adenoid Squamous cell
CarcinomaCarcinoma
Lmphoepithelioma and Lmphoepithelioma and
Transitional cell Transitional cell
carcinomacarcinoma
Malignant MelanomaMalignant Melanoma

8. Classification of Non Odontogenic Tumours..Classification of Non Odontogenic Tumours..
Connective TissueConnective Tissue
–BenignBenign
FibromaFibroma
Giant Cell FibromaGiant Cell Fibroma
Peripheral Ossifying Peripheral Ossifying
FibromaFibroma
Central Ossifying Central Ossifying
FibromaFibroma
Peripheral Giant cell Peripheral Giant cell
GranulomaGranuloma
Central GCGCentral GCG
Aneursmal Bone CystAneursmal Bone Cyst
MyxomaMyxoma
–MalignantMalignant
FibrosarcomaFibrosarcoma
Adipose tissueAdipose tissue
–BenignBenign
LipomaLipoma
Verruciform XanthomaVerruciform Xanthoma
–MalignantMalignant
LiposarcomaLiposarcoma

9. Classification of Non Odontogenic Tumours…Classification of Non Odontogenic Tumours…
Vascular TissueVascular Tissue
–BenignBenign
HemangiomaHemangioma
Hereditary Haemorrhagic Hereditary Haemorrhagic
TalengiectasiaTalengiectasia
Encephalo-trigeminal Encephalo-trigeminal
AngiomatosisAngiomatosis
Nasopharyngeal Nasopharyngeal
AngiofibromaAngiofibroma
LmphangiomaLmphangioma
–MalignantMalignant
HaemangioendotheliomaHaemangioendothelioma
HaemangiopericytomaHaemangiopericytoma
KaposiKaposi’’s Sarcomas Sarcoma
Cartilage tissueCartilage tissue
–BenignBenign
ChondromaChondroma
Benign ChondroblastomaBenign Chondroblastoma
Chondromyxoid FibromaChondromyxoid Fibroma
–MalignantMalignant
ChondrosarcomaChondrosarcoma

10. Classification of Non Odontogenic Tumours…Classification of Non Odontogenic Tumours…
Bone tissueBone tissue
–BenignBenign
OsteomaOsteoma
Osteoid OsteomaOsteoid Osteoma
Benign OsteoblastomaBenign Osteoblastoma
–MalignantMalignant
OsteosarcomaOsteosarcoma
Muscle tissueMuscle tissue
–BenignBenign
LeiomyomaLeiomyoma
AngiomyomaAngiomyoma
RhabdomyomaRhabdomyoma
–MalignantMalignant
LeiomosarcomaLeiomosarcoma
RhabdomyosarcomaRhabdomyosarcoma
Lymphoid TissueLymphoid Tissue
–MalignantMalignant
Malignant LymphomaMalignant Lymphoma
Non-HodgkinNon-Hodgkin’’s Lymphomas Lymphoma
Reticular Cell SarcomaReticular Cell Sarcoma
BurkittBurkitt’’s Lymphomas Lymphoma
HodgkinHodgkin’’s Diseases Disease
LeukaemiasLeukaemias
Ewings SarcomaEwings Sarcoma
Plasma Cell TumoursPlasma Cell Tumours
–Multiple MyelomaMultiple Myeloma
–PlasmacytomaPlasmacytoma

11. Classification of Non Odontogenic Tumours…Classification of Non Odontogenic Tumours…
Nerve TissueNerve Tissue
–BenignBenign
NeurofibromaNeurofibroma
NeurolemmomaNeurolemmoma
–MalignantMalignant
Malignant SchannomaMalignant Schannoma
Tumour Like LesionsTumour Like Lesions
Peripheral Giant Cell Peripheral Giant Cell
GranulomaGranuloma
CGCGCGCG
ExostosesExostoses
Pyogenic GranulomaPyogenic Granuloma
Anurysmal Bone CystAnurysmal Bone Cyst
Traumatic NeuromaTraumatic Neuroma
Tumours of Disputed Tumours of Disputed
OriginOrigin
Granular Cell Granular Cell
MyoblastomaMyoblastoma
Congenital EpulisCongenital Epulis
Alveolar Soft Part Alveolar Soft Part
SarcomaSarcoma
Melanotic Melanotic
Neuroectodermal Neuroectodermal
tumour of infancytumour of infancy
KaposiKaposi’’s Sarcomas Sarcoma
EwingEwing’’s Sarcomas Sarcoma