Lichen Planus

Question 1

def

Answer 1

hronic inflammatory skin condition affecting skin and/or mucosal surfaces

Question 2

what charac LP

4 p’s

Answer 2

purple polygonal pruritic papules that form plaques

Question 3

mechh

Answer 3

T cell-mediated autoimmune disease, in which inflammatory cells attack an unknown protein within skin and mucosal keratinocytes

Question 4

cutaneous

Answer 4

front of the wrists, lower back, and ankles

plaques often have a purple or violet hue, except on palms and soles where they are yellowish brown.

plaques are crossed by fine white lines called Wickham striae

Question 5

cause of Wickham striae

Answer 5

stretching of skin

Question 6

Oral lichen planus

Answer 6

inside of the cheeks sides of the tongue, gums and lips
hard palate

sign of more recalcitrant form

Question 7

Vulval lichen planus

Answer 7

abia majora, labia minora and vaginal introitus.

Scarring, resulting in adhesions

Painful desquamative vaginitis, preventing intercourse, and causing a mucky discharge. The eroded vagina may bleed easily on contac

Question 8

Penile lichen planus

Answer 8

classical papules in a ring around the glans

Question 9

Lichen planopilaris

Answer 9

tiny red spiny follicular papules on the scalp

Destruction of the hair follicles leads to permanently bald patches characterised by sparse “lonely hairs”

Question 10

Nail lichen planus

Answer 10

called twenty-nail dystrophy if all nails are abnormal and nowhere else is affected

sheding of nais

loss of nails (anonychia)

scarring of cuticle
pterygium)

Question 11

Lichen planus pigmentosus

Answer 11

ill-defined oval, greyish brown marks on the face and neck or trunk and limbs without an inflammatory phase

provoked by sun exposure

causes dark patchy pig of lips

Question 12

Lichen planus pigmentosus is similar to

Answer 12

Erythema dyschromicum perstans
benign skin condition characterised by well-circumscribed round to oval or irregular patches on the face, neck and trunk that are grey in colour. It is a form of acquired dermal macular hyperpigmentation.

Question 13

Lichenoid drug eruption

Answer 13

lichen planus-like rash caused by medications.

gold

captopril

hydroxychloroquinone

Question 14

complications

Answer 14

SCC

-enlarging nodule or an ulcer with thickened edges.

Question 15

dg

Answer 15

clinical ft’s

patch test for mercury allergy w/ oral LP of gums

skin biopsy

• melanin beneath dermis
• liq degen of epidermal basal layer
• Band of inflammatory cells just beneath the epidermis

Question 16

rx

Answer 16

topical steroids
topical retinoids

systemic

• oral prednisolone
• acitrecin
• hydroxychloroquinolone

Question 17

prog

Answer 17

perm scaring
oral 10 years
cutaneous 2 yrs