Histology Flashcards
What type of epithelium is the palate?
Keratinised
What type of epithelium is the cheek?
Non-keratinised
What is acanthosis?
Hyperplasia of stratum spinosum
What are elongated rete ridges?
Hyperplasia of basal cells
What is keratosis in a non-keratinised site?
Parakeratosis
What is atrophy?
Reduction in viable layers
What is erosion?
Partial thickness loss
What is ulceration?
Full thickness loss with fibrin on surface
What is dysplasia?
Disordered maturation (growth) in a tissue
Atypia- changes in cells
Changes in appearance of cells, function, arrangement to other cells
What is an epulide?
Soft tissue swelling on the gingiva only
Reaction to chronic inflammation/chronic trauma
Can reoccur after removal if stimulus persists
What is a fibrous overgrowth?
Localised gingival hyperplasia
Can be:
–fibrous epulis
–vascular epulis (pyogenic granuloma)
What causes giant cell lesions?
Unphagocytosable materials
–local chronic irritation
–infective agents e.g. TB bacillus
–hormonal stimulation of cells- osteoclasts
Autoimmune- Sarcoidosis
What drugs can induce fibrous overgrowths?
Anti-hypertensives
–calcium channel blockers
Anti-epileptics
–phenytoin
Immunosuppressants
–cyclosporin
What is a potentially malignant condition?
Generalised state with increased cancer risk
What are some potentially malignant conditions related to the oral cavity?
Lichen planus
Oral submucous fibrosis
Iron deficiency
Tertiary syphilis