Abstract
SummaryAn attempt was made to elucidate the relative importance of heredity and exogenous factors in the etiology of rheumatoid arthritis by a study of the concordance rate in monozygotic twins. Four sets of such monozygotic twins are reported and discussed. Three of them were discordant and one concordant, but with an atypical syndrome. When added to previously published cases in monozygotic twins, these cases bring the number up to 50 sets of monozygotic twins with rheumatoid arthritis 32 or 64 % of whom have shown discordance. It is concluded that an exogenous factor must be operative.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
