Question
Most common etiology of erythema multiforme is?
| A. |
Idiopathic
|
| B. |
Drugs
|
| C. |
HSV
|
| D. |
TB
|
Show Answer
|
Correct Answer » C
Explanation
|
|
- HSV is the most common identifiable cause of erythema multiforme.
- Especially associated with recurrent erythema multiforme.
- HSV-triggered immune reaction produces characteristic “target lesions.”
Why Other Options are Incorrect
A. Idiopathic
- Some cases are idiopathic, but HSV is the commonest known etiology.
B. Drugs
- Drugs are more commonly associated with:
- Stevens–Johnson syndrome (SJS)
- Toxic epidermal necrolysis (TEN)
- Less common cause of classic erythema multiforme.
D. TB
- Tuberculosis is a rare and uncommon association.
- Not a typical cause of erythema multiforme.
