Urticaria-Wheals

Question 1

morphology

Answer 1

erythematous plaques that might look edamatous

Question 2

typical time line for urticaria

Answer 2

only lasts 24 hours! If lasts longer, usually have other things on the differential

Question 3

why does urticaria look edematous

Answer 3

plasma leakage

Question 4

Superficial dermal swellings are ___, and deep swellings of the skin or mucosa are termed ___.

Answer 4

Superficial dermal swellings are wheals, and deep swellings of the skin or mucosa are termed angioedema.

Question 5

causes of urticaria

Answer 5

Urticaria can occur as a result of allergy, autoimmunity, drugs, or infections. Many cases remain unexplained or “idiopathic”, even after an extensive evaluation.

Question 6

Answer 6

urticaria

Question 7

Answer 7

angioedema

Question 8

Angioedema and wheals are both urticaria but differ in the ____ of the _____ process.

Answer 8

differ in depth of the inflammatory processes. angioedema involves the deep tissue and mucosa involvement, but wheals often just have dermal involvement.

Question 9

acute vs chronic wheal causes

Answer 9

acute: <6 weeks, exogenous/allergy/drugs/viruses
chronic: endogenouse causes, autoimmune, infection-related or genetics

Question 10

2 common types of idiopathic chronic urticaria

Answer 10

1. dermatographism: “writing on skin” induction of wheals by touch
2. cholinergic urticaria: multiple small papular qwheals with erythematous flares. occurs with sweat and physical exertion. baths can also induce CU

Question 11

what causes cholinergic chronic urticaria

Answer 11

sweat, physical exertion or baths

Question 12

Answer 12

dermatographism

Question 13

this happened after going to the gym– it happens every time

Answer 13

cholinergic urticaria