pannus

noun
pan·​nus | \ˈpan-əs \
plural panni\ˈpan-​ˌī \

Medical Definition of pannus 

1 : a vascular tissue causing a superficial opacity of the cornea and occurring especially in trachoma

2 : a sheet of inflammatory granulation tissue that spreads from the synovial membrane and invades the joint in rheumatoid arthritis ultimately leading to fibrous ankylosis

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