Colors Flashcards
Causes of white
thickened epithelium (hyperkeratosis, acanthosis, dysplasia, carcinoma) decreased vascularity (anemia) increased collagen (submucous fibrosis - beetle juice chewing)
Causes of red
thinner epithelium
increased vascularity
dissolution of collagen content of subepithelial tissue
Causes of blue
venous blood collection
tyndall effect (light refraction)
medications
Causes of black
melanin
heavy metal
Causes of brown
melanin hemosiderin (yellowish brown granular pigment formed from break down of Hb found in phagocytes)
Causes of yellow
adipose
sebaceous material
pus (collection of necrotic material, PMNs and lymphocytes)
Most common colors order
White > red > black > blue > brown > yellow
White that rubs off
materia alba white coated tongue burn toothpaste/mouthwash OD pseudomembranous candadiasis
White that doesnt
leukoplakia leukoedema chronic cheek biting tobacco pouch keratosis lichen planus nicotine stomatitis linea alba oral hairy leukoplakia
Leukoplakia tx
remove frictional cause
biop after 2 weeks
Tobacco pouch keratosis
smokeless tobacco pouch snuff pouch spit tobacco keratosis white plaque with horizontal furrotws recession and root caries possible dose response leading to verrucous carcinoma reversible
Lichen planus
skin lesions: purple, puritic, polygonal papules
Lichen planus differential
desquamative gingivitis
Lichen planus F/M
3F>2M
Lichen planus tx
topical steroid
White and red lesion
recurrent apthous ulcers geographic tongue desquamative gingivitis actinic keratosis erythroleukoplakia