Crystal arthropathies
Crystal arthropathy definition https://radiopaedia.org/articles/crystal-arthropathy
Podcast on acute monoarthritis including Gout/Pseudogout, septic arthritis and occult trauma https://emergencymedicinecases.com/episode-16-acute-monoarthritis/
Joint aspiration http://lifeinthefastlane.com/procedures/joint-aspiration/