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What is Target lesions are seen in: and explain in detail?
Ans: d (Erythema multiforme) Ref: Davidson, 20th ed, p. 1309Erythema multiforme has target lesions or bulls eye lesionsProvoking factors in erythema multiforme:* Herpes simplex infection* Other viral infections, e.g: otfi and mycoplasma* Bacterial infection* Drugs especially sulphonamides penicillin and barbiturates* Internal malignancy or its treatment with radiotherapyErythema marginatumThe skin lesion in erythema marginatum is associated with rheumatic fever. It is a major manifestation in Jones criteria for the diagnosis of rheumatic feverNote:Human Orf virus cause erythma contagiosaHerpes induced erythema multiforme can be treated with acyclovir