carcinoid
C2CEFR level
92/100Rarity: very rare
TechnicalRegister
A slow-growing neuroendocrine tumour that may secrete vasoactive substances such as serotonin.
A midgut carcinoid presented with flushing and diarrhoea once it had metastasised to the liver.
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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