How often does palindromic rheumatism result in rheumatoid arthritis?

Half the time. Palindromic rheumatism will evolve into a more classic RA about 50% of the time.
Palindromic rheumati. It has been suggested that it is an abortive form of rheumatoid arthritis, since anti-cyclic citrullinated peptide antibodies (anti-ccp) and antikeratin antibodies (aka) are present in a high proportion of patients, as is the case in rheumatoid arthritis. Unlike RA and some other forms of arthritis, palindromic rheumatism affects men and women equally.