cutaneous TB Flashcards
what is cutaneous TB
skin infection w/ mycobacterium tubberoculosis.
countries with high tb rate
india
china
5 types of cutanoues tb
tb verrucosa cutis
lupus vulgaris
scofuloderma
milliary tb
tuberculid
what determines the type of cutaneous TB
pt immune respinse
mycobacterium virulence
regardless of the type what is the initial presentation of cutaneous TB
tuberculous chancre
- firm shallow granular base
when does the tb chancre present
2-4 weeks after direct infection of skin or mucosa
describe tb verrucosa cutis
purple, red, brown wart
sites
- knees elbows
- hands feet
- buttocks
persist for years
spontaneous resolution possible
describe lupus vulgaris
persistant & progressive
APPLE JELLY NODULES
-small red brown lesions w. jelly consistency
can lead to skin cancer
scrufuloderma
extension of tb in LN/ bones/ joints to skin
assoc w/ pulm tb
firm and painless
granular base
unsightly scar
spontaneous rx possible
milliary tb
spread from primiay pulm tb via blood
millet sized red spots-> ulcer -> abscess
immonucomp pts
poor prog (death)
tubercullid
general exanthema
common in pt w / some tb immunity
pt in good health
types of tubercullid presentations
erythema induratum/ bazin disease -
papulonecrotic tuberculd
lichen scrufulosorum
describe bazin’s disease lesions
nodules on the back of the legs that ulcer and scar
common in women
describe papulonecrotic tuberculid
reccurent crusted skin papules on knees elbows, trunk and buttocks
heal w. scarring after 6 weeks
describe lichen scrofulosorum
small papules in the follicules of young pts
