Assertion: rheumatoid arthritis's joint | /r/HasProperty | swan neck
Facets:
Source sentences:
text: Typical deformities include ulnar deviation of the fingers at the MCP joints, hyperextension or hyperflexion of the MCP and PIP joints (swan neck and boutonniere deformities), flexion contractures of the elbows, and subluxation of the carpal bones and toes (hammer toes and cock up deformities).