Drug Eruptions
Morbilliform: Most common. Symmetric maculopapular rash. Starts on trunk, spreads.
Fixed drug eruption: Round erythematous plaque, recurs at same site. Lips, genitalia common. Darker pigmentation after healing.
Stevens-Johnson Syndrome (SJS): Targetoid lesions, mucous membrane involvement, fever. <10% BSA involved. Mortality 1-5%.
Toxic Epidermal Necrolysis (TEN): >30% BSA detachment. Mucosal involvement. Mortality 30-50%.
Leprosy
Classification (Ridley-Jopling):
- TT (Tuberculoid): 1-2 hypopigmented macules, strong +ve Lepromin
- BT (Borderline tuberculoid): 3-10 lesions
- BB (Mid-borderline): Variable
- BL (Borderline lepromatous): Many lesions, +ve Lepromin
- LL (Lepromatous): Diffuse, leonine facies, -ve Lepromin
Revision history
- 20 September 2026 — Initial publication
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