2. LICHEN PLANUS
DIFINETION
CHRINIC INFLAMMATORY DISEASE OF UNKNOW
ETIOLOGY CHARECTRISED BY ------
SHINY VIOLACEOUS ITCHY FLAT TOPPED PAPULAR
LESIONS MORPHOLOGICALLY &
HISTOLOGICALLY CHARECTERISED BY --------
LIQUIFIED DEGENRATION OF BASAL CELL LAYER AND
BAND LIKE LINEAR CELLULAR
INFILTRATION IN DERMIS
3. INCIDENCE
WORLD WIDE – MUCH MORE IN ASIAN
COUNTRIES
1 TO 2 % OF ALL NEW CASES IN
DERMATOLOGY CLINIC
SKIN LESION SUBSIDES IN 50 % OF CASES
IN 9 MONTHS AND 100% BY 18 MONTHS
MUCOUS MEMBREANS INVOLVE IN 30 OT 70 %
CASES
NAIL INVOLMENT IN 10% OF CASES