a known case of
C1CEFR level
78/100Rarity: rare
TechnicalRegister
A phrase identifying a patient with an established, previously diagnosed condition.
She is a known case of rheumatoid arthritis, managed with methotrexate.
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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