If a knight in the middle ages got arthritis in a finger joint or anywhere in his hand, could he still perform as a knight?

i'm a medieval/history enthusiast from england and i just wondered about a situation all the way back in the middle ages where if a knight got arthritis in a finger, knuckle or anywhere in his hand, could he still be a knight and do things like wield a sword, axe or dagger? or would the osteoarthritis finish... show more i'm a medieval/history enthusiast from england and i just wondered about a situation all the way back in the middle ages where if a knight got arthritis in a finger, knuckle or anywhere in his hand, could he still be a knight and do things like wield a sword, axe or dagger? or would the osteoarthritis finish those abilities off?
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