A medical condition characterized by inflammation of internal tissues or structures, a historical or theoretical medical term.
From endo- (within, from Greek endon) + -angitis (inflammation of vessels, from Greek angeion + -itis). This appears to be a variant or earlier form of medical terminology related to internal inflammation.
This word shows up occasionally in old medical texts but modern doctors would just say 'internal inflammation' or use a more specific term, proving that medical language constantly evolves and abandons words that don't work well in practice.
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