1B20.21 Type II leprosy reaction
International Classification of Diseases for Mortality and Morbidity Statistics, 11th Revision, v2024-01
This phenomenon, also named downgrading reaction, occurs in borderline leprosy states and is associated with a decrease in cell-mediated immunity with a shift towards the lepromatous end of the clinical spectrum.
postcoordination
Add Stem and/or Extension codes to form a cluster code which adds detail to the condition.
Has manifestation - multiple selections are allowed
synonyms
- Type II leprosy reaction
- Type II downgrading reaction
- Erythema nodosum leprosum
- Lucio phenomenon
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