pannus
C2CEFR level
96/100Rarity: very rare
TechnicalRegister
An abnormal layer of inflammatory granulation tissue that invades and erodes cartilage and bone in rheumatoid arthritis.
Histology of the resected joint showed aggressive pannus overgrowing the denuded articular cartilage.
Rarity runs from 0 (a word everyone knows) to 100 (almost never seen outside specialist or literary writing). Level is the word's real difficulty on the CEFR scale, from A1 to C2.
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